# American Institute of Mathematical Sciences

doi: 10.3934/amc.2021025
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## Four by four MDS matrices with the fewest XOR gates based on words

 1 Faculty of Mathematics and Statistics, Hubei Key Laboratory of Applied Mathematics, Hubei University, Wuhan 430062, China 2 State Key Laboratory of Information Security, Institute of Information Engineering, , University of Chinese Academy of Sciences, Beijing, China

* Corresponding author: Xiangyong Zeng

Received  April 2021 Revised  May 2021 Early access July 2021

Fund Project: Xiangyong Zeng was supported by Application Foundation Frontier Project of Wuhan Science and Technology Bureau under Grant 2020010601012189 and National Natural Science Foundation of China under Grant 61761166010. Yongqiang Li was supported by National Natural Science Foundation of China under Grant 61772517

MDS matrices play an important role in the design of block ciphers, and constructing MDS matrices with fewer xor gates is of significant interest for lightweight ciphers. For this topic, Duval and Leurent proposed an approach to construct MDS matrices by using three linear operations in ToSC 2018. Taking words as elements, they found $16\times16$ and $32\times 32$ MDS matrices over $\mathbb{F}_2$ with only $35$ xor gates and $67$ xor gates respectively, which are also the best known implementations up to now. Based on the same observation as their work, we consider three linear operations as three kinds of elementary linear operations of matrices, and obtain more MDS matrices with $35$ and $67$ xor gates. In addition, some $16\times16$ or $32\times32$ involutory MDS matrices with only $36$ or $72$ xor gates over $\mathbb{F}_2$ are also proposed, which are better than previous results. Moreover, our method can be extended to general linear groups, and we prove that the lower bound of the sequential xor count based on words for $4 \times 4$ MDS matrix over general linear groups is $8n+2$.

Citation: Shi Wang, Yongqiang Li, Shizhu Tian, Xiangyong Zeng. Four by four MDS matrices with the fewest XOR gates based on words. Advances in Mathematics of Communications, doi: 10.3934/amc.2021025
##### References:
 [1] R. Avanzi, The QARMA block cipher family. Almost MDS matrices over rings with zero divisors, nearly symmetric even-mansour constructions with non-involutory central rounds, and search heuristics for low-latency s-boxes, IACR Trans. Symmetric Cryptol., 2017 (2017), 4-44.  doi: 10.46586/tosc.v2017.i1.4-44.  Google Scholar [2] S. Banik, A. Bogdanov, T. Isobe, K. Shibutani, H. Hiwatari, T. Akishita and F. Regazzoni, Midori: A block cipher for low energy (extended version), ASIACRYPT 2015, Lecture Notes in Computer Science, 9453 (2015), 411-436.  doi: 10.1007/978-3-662-48800-3_17.  Google Scholar [3] S. Banik, Y. Funabiki and T. Isobe, More results on shortest linear programs, Advances in Information and Computer Security - 14th International Workshop on Security, IWSEC 2019, Lecture Notes in Computer Science, 11689 (2019), 109–128. doi: 10.1007/978-3-030-26834-3_7.  Google Scholar [4] S. Banik, S. K. Pandey, T. Peyrin, Y. Sasaki, S. M. Sim and Y. 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Symmetric Cryptol., 2017 (2017), 129-155.  doi: 10.13154/tosc.v2017.i1.129-155.  Google Scholar [16] S. Li, S. Sun, C. Li, Z. Wei and L. Hu, Constructing low-latency involutory MDS matrices with lightweight circuits, IACR Trans. Symmetric Cryptol., 2019 (2019), 84-117.  doi: 10.46586/tosc.v2019.i1.84-117.  Google Scholar [17] Y. Li and M. Wang, On the construction of lightweight circulant involutory MDS matrices, Fast Software Encryption 2016, Lecture Notes in Computer Science, 9783 (2016), 121-139.  doi: 10.1007/978-3-662-52993-5_7.  Google Scholar [18] M. Liu and S. M. Sim, Lightweight MDS generalized circulant matrices, Fast Software Encryption 2016, Lecture Notes in Computer Science, 9783 (2016), 101-120.  doi: 10.1007/978-3-662-52993-5_6.  Google Scholar [19] F. J. Macwilliams and N. J. A. Sloane, The theory of error correcting codes, North-Holland Mathematical Library, Amsterdam-New York Oxford: North-Holland Publishing Company, 16 (1977), 370-762.   Google Scholar [20] S. Sarkar and H. Syed, Lightweight diffusion layer: Importance of toeplitz matrices, ACR Trans. Symmetric Cryptol., 2016 (2016), 95-113.  doi: 10.13154/tosc.v2016.i1.95-113.  Google Scholar [21] S. M. Sim, K. Khoo, F. E. Oggier and T. Peyrin, Lightweight MDS involution matrices, Fast Software Encryption 2015, 9054 (2015), 471-493.  doi: 10.1007/978-3-662-48116-5_23.  Google Scholar [22] F. X. Standaert, G. Piret, G. Rouvroy, J. J. Quisquater and J. D. Legat, ICEBERG: An involutional cipher effcient for block encryption in reconfigurable hardware, Fast Software Encryption 2004, 3017 (2004), 279-299.   Google Scholar [23] Q. Q Tan and T. Peyrin, Improved heuristics for short linear programs, IACR Trans. Cryptogr., 2020 (2020), 203-230.  doi: 10.13154/tches.v2020.i1.203-230.  Google Scholar [24] A. Visconti, C. V. Schiavo and R. Peralta, Improved upper bounds for the expected circuit complexity of dense systems of linear equations over ${\rm{GF}}(2)$, Information Processing Letters, 137 (2018), 1-5.  doi: 10.1016/j.ipl.2018.04.010.  Google Scholar [25] S. Wu, M. Wang and W. Wu, Recursive diffusion layers for (lightweight) block ciphers and hash functions, Selected Areas in Cryptography 2012, Lecture Notes in Computer Science, 7707 (2012), 355-371.  doi: 10.1007/978-3-642-35999-6_23.  Google Scholar [26] Z. Xiang, X. Zeng, D. Lin, Z. Bao and S. Zhang, Optimizing implementations of linear layers, IACR Trans. Symmetric Cryptol., 2020 (2020), 120-145.  doi: 10.46586/tosc.v2020.i2.120-145.  Google Scholar [27] W. Zhang, Z. Bao, D. Lin, V. Rijmen, B. Yang and I. Verbauwhede, RECTANGLE: A bit-slice lightweight block cipher suitable for multiple platforms, Science China Information Sciences, 58 (2015), 1-15.  doi: 10.1007/s11432-015-5459-7.  Google Scholar [28] L. Zhou, L. Wang and Y. Sun, On efficient constructions of lightweight MDS matrices, IACR Trans. Symmetric Cryptol., 2018 (2018), 180-200.  doi: 10.46586/tosc.v2018.i1.180-200.  Google Scholar

show all references

##### References:
 [1] R. Avanzi, The QARMA block cipher family. Almost MDS matrices over rings with zero divisors, nearly symmetric even-mansour constructions with non-involutory central rounds, and search heuristics for low-latency s-boxes, IACR Trans. Symmetric Cryptol., 2017 (2017), 4-44.  doi: 10.46586/tosc.v2017.i1.4-44.  Google Scholar [2] S. Banik, A. Bogdanov, T. Isobe, K. Shibutani, H. Hiwatari, T. Akishita and F. Regazzoni, Midori: A block cipher for low energy (extended version), ASIACRYPT 2015, Lecture Notes in Computer Science, 9453 (2015), 411-436.  doi: 10.1007/978-3-662-48800-3_17.  Google Scholar [3] S. Banik, Y. Funabiki and T. Isobe, More results on shortest linear programs, Advances in Information and Computer Security - 14th International Workshop on Security, IWSEC 2019, Lecture Notes in Computer Science, 11689 (2019), 109–128. doi: 10.1007/978-3-030-26834-3_7.  Google Scholar [4] S. Banik, S. K. Pandey, T. Peyrin, Y. Sasaki, S. M. Sim and Y. Todo, GIFT: A small present - towards reaching the limit of lightweight encryption, In: Cryptographic Hardware and Embedded Systems 2017, Lecture Notes in Computer Science, 10529 (2017), 321–345. doi: 10.1007/978-3-319-66787-4\_16.  Google Scholar [5] C. Beierle, T. Kranz and G. Leander, Lightweight multiplication in ${\rm{GF}}(2^n)$ with applications to MDS matrices, CRYPTO 2016, Lecture Notes in Computer Science, 9814 (2016), 625-653.  doi: 10.1007/978-3-662-53018-4_23.  Google Scholar [6] A. Bogdanov, L. R. Knudsen, G. Leander, C. Paar, A. Poschmann, M. J. B. Robshaw, Y. Seurin and C. Vikkelsoe, PRESENT: An ultra-lightweight block cipher, Cryptographic Hardware and Embedded Systems 2007, 4227 (2007), 450-466.  doi: 10.1007/978-3-540-74735-2_31.  Google Scholar [7] J. Borghoff, A. Canteaut, T. Güneysu, E. B. Kavun, M. Knezevic, L. R. Knudsen, G. Leander, V. Nikov, C. Paar, C. Rechberger, P. Rombouts, S. S. Thomsen and T. Yalç, PRINCE - A low-latency block cipher for pervasive computing applications - extended abstract, ASIACRYPT 2012, Lecture Notes in Computer Science, 7658 (2012), 208-225.  doi: 10.1007/978-3-642-34961-4\_14.  Google Scholar [8] J. Boyar, P. Matthews and R. Peralta, Logic minimization techniques with applications to cryptology, J. Cryptology, 26 (2013), 280-312.  doi: 10.1007/s00145-012-9124-7.  Google Scholar [9] J. Daemen and V. Rijmen, The Design of Rijndael: AES - The Advanced Encryption Standard, Information Security and Cryptography. Springer, 2002. doi: 10.1007/978-3-662-04722-4.  Google Scholar [10] S. Duval and G. Leurent, MDS matrices with lightweight circuits, IACR Trans. Symmetric Cryptol., 2018 (2018), 48-78.  doi: 10.13154/tosc.v2018.i2.48-78.  Google Scholar [11] J. Guo, T. Peyrin and A. Poschmann, The PHOTON family of lightweight hash functions, CRYPTO 2011, Lecture Notes in Computer Science, 6841 (2011), 222-239.  doi: 10.1007/978-3-642-22792-9_13.  Google Scholar [12] J. Guo, T. Peyrin, A. Poschmann and M. J. B. Robshaw, The LED block cipher, Cryptographic Hardware and Embedded Systems 2011, Lecture Notes in Computer Science, 6917 (2011), 326-341.  doi: 10.1007/978-3-642-23951-9_22.  Google Scholar [13] J. Jean, T. Peyrin, S. M. Sim and J. Tourteaux, Optimizing implementations of lightweight building blocks, IACR Trans. Symmetric Cryptol., 2017 (2017), 130-168.  doi: 10.13154/tosc.v2017.i4.130-168.  Google Scholar [14] T. Kranz, G. Leander, K. Stoffelen and F. Wiemer, Shorter linear straight-line programs for MDS matrices, IACR Trans. Symmetric Cryptol., 2017 (2017), 188-211.  doi: 10.46586/tosc.v2017.i4.188-211.  Google Scholar [15] C. Li and Q. Wang, Design of lightweight linear diffusion layers from near-mds matrices, IACR Trans. Symmetric Cryptol., 2017 (2017), 129-155.  doi: 10.13154/tosc.v2017.i1.129-155.  Google Scholar [16] S. Li, S. Sun, C. Li, Z. Wei and L. Hu, Constructing low-latency involutory MDS matrices with lightweight circuits, IACR Trans. Symmetric Cryptol., 2019 (2019), 84-117.  doi: 10.46586/tosc.v2019.i1.84-117.  Google Scholar [17] Y. Li and M. Wang, On the construction of lightweight circulant involutory MDS matrices, Fast Software Encryption 2016, Lecture Notes in Computer Science, 9783 (2016), 121-139.  doi: 10.1007/978-3-662-52993-5_7.  Google Scholar [18] M. Liu and S. M. Sim, Lightweight MDS generalized circulant matrices, Fast Software Encryption 2016, Lecture Notes in Computer Science, 9783 (2016), 101-120.  doi: 10.1007/978-3-662-52993-5_6.  Google Scholar [19] F. J. Macwilliams and N. J. A. Sloane, The theory of error correcting codes, North-Holland Mathematical Library, Amsterdam-New York Oxford: North-Holland Publishing Company, 16 (1977), 370-762.   Google Scholar [20] S. Sarkar and H. Syed, Lightweight diffusion layer: Importance of toeplitz matrices, ACR Trans. Symmetric Cryptol., 2016 (2016), 95-113.  doi: 10.13154/tosc.v2016.i1.95-113.  Google Scholar [21] S. M. Sim, K. Khoo, F. E. Oggier and T. Peyrin, Lightweight MDS involution matrices, Fast Software Encryption 2015, 9054 (2015), 471-493.  doi: 10.1007/978-3-662-48116-5_23.  Google Scholar [22] F. X. Standaert, G. Piret, G. Rouvroy, J. J. Quisquater and J. D. Legat, ICEBERG: An involutional cipher effcient for block encryption in reconfigurable hardware, Fast Software Encryption 2004, 3017 (2004), 279-299.   Google Scholar [23] Q. Q Tan and T. Peyrin, Improved heuristics for short linear programs, IACR Trans. Cryptogr., 2020 (2020), 203-230.  doi: 10.13154/tches.v2020.i1.203-230.  Google Scholar [24] A. Visconti, C. V. Schiavo and R. Peralta, Improved upper bounds for the expected circuit complexity of dense systems of linear equations over ${\rm{GF}}(2)$, Information Processing Letters, 137 (2018), 1-5.  doi: 10.1016/j.ipl.2018.04.010.  Google Scholar [25] S. Wu, M. Wang and W. Wu, Recursive diffusion layers for (lightweight) block ciphers and hash functions, Selected Areas in Cryptography 2012, Lecture Notes in Computer Science, 7707 (2012), 355-371.  doi: 10.1007/978-3-642-35999-6_23.  Google Scholar [26] Z. Xiang, X. Zeng, D. Lin, Z. Bao and S. Zhang, Optimizing implementations of linear layers, IACR Trans. Symmetric Cryptol., 2020 (2020), 120-145.  doi: 10.46586/tosc.v2020.i2.120-145.  Google Scholar [27] W. Zhang, Z. Bao, D. Lin, V. Rijmen, B. Yang and I. Verbauwhede, RECTANGLE: A bit-slice lightweight block cipher suitable for multiple platforms, Science China Information Sciences, 58 (2015), 1-15.  doi: 10.1007/s11432-015-5459-7.  Google Scholar [28] L. Zhou, L. Wang and Y. Sun, On efficient constructions of lightweight MDS matrices, IACR Trans. Symmetric Cryptol., 2018 (2018), 180-200.  doi: 10.46586/tosc.v2018.i1.180-200.  Google Scholar
The implementations circuit of paths in $6$ classes
The implementation circuit of MDS matrix $M$ based on words
Comparison with MDS matrices with fewest xor gates ($\alpha_1$ is the companion matrix of $X^4 + X + 1$, and $\alpha_2$ is the companion matrix of $X^8 + X^2 + 1 = \left(X^4 + X + 1\right)^2$)
 Size Ring Type Best Ref n=4 $\mathbb{F}_2[\alpha_1]$ non-involutory $35$ [10] $\mathbb{F}_2[\alpha_1]$ non-involutory $35$ Section 4.2 $\mathbb{F}_2[\alpha_1]$ involutory $42$ [20] $\mathbb{F}_2[\alpha_1]$ involutory $36$ Section 4.3 n=8 $\mathbb{F}_{2^8}$ AES $92$ [26] $\mathbb{F}_2[\alpha_2]$ non-involutory $67$ [10] $\mathbb{F}_2[\alpha_2]$ non-involutory $67$ Section 4.2 $\mathrm{GL}(8, \, \mathbb{F}_2)$ involutory $84$ [14] $\mathbb{F}_2[\alpha_2]$ involutory $78$ [16] $\mathbb{F}_2[\alpha_2]$ involutory $72$ Section 4.3
 Size Ring Type Best Ref n=4 $\mathbb{F}_2[\alpha_1]$ non-involutory $35$ [10] $\mathbb{F}_2[\alpha_1]$ non-involutory $35$ Section 4.2 $\mathbb{F}_2[\alpha_1]$ involutory $42$ [20] $\mathbb{F}_2[\alpha_1]$ involutory $36$ Section 4.3 n=8 $\mathbb{F}_{2^8}$ AES $92$ [26] $\mathbb{F}_2[\alpha_2]$ non-involutory $67$ [10] $\mathbb{F}_2[\alpha_2]$ non-involutory $67$ Section 4.2 $\mathrm{GL}(8, \, \mathbb{F}_2)$ involutory $84$ [14] $\mathbb{F}_2[\alpha_2]$ involutory $78$ [16] $\mathbb{F}_2[\alpha_2]$ involutory $72$ Section 4.3
Circuit implementation of the matrix $M_0$ using extra registers
 No. Operation No. Operation No. Operation 1 $x_6\leftarrow x_1+x_3$ 2 $x_7 \leftarrow x_6+x_5$ 3 $x_8 \leftarrow x_0+x_7[y_0]$ 4 $x_{9} \leftarrow x_2+x_7[y_2]$ 5 $x_{10} \leftarrow x_4+x_7[y_4]$ 6 $x_{11} \leftarrow x_{10}+x_0$ 7 $x_{12} \leftarrow x_{11}+x_2$ 8 $x_{13} \leftarrow x_{12}+x_{1}[y_1]$ 9 $x_{14} \leftarrow x_{12}+x_3[y_3]$ 10 $x_{14} \leftarrow x_{12}+x_5[y_5]$
 No. Operation No. Operation No. Operation 1 $x_6\leftarrow x_1+x_3$ 2 $x_7 \leftarrow x_6+x_5$ 3 $x_8 \leftarrow x_0+x_7[y_0]$ 4 $x_{9} \leftarrow x_2+x_7[y_2]$ 5 $x_{10} \leftarrow x_4+x_7[y_4]$ 6 $x_{11} \leftarrow x_{10}+x_0$ 7 $x_{12} \leftarrow x_{11}+x_2$ 8 $x_{13} \leftarrow x_{12}+x_{1}[y_1]$ 9 $x_{14} \leftarrow x_{12}+x_3[y_3]$ 10 $x_{14} \leftarrow x_{12}+x_5[y_5]$
Elementary matrices of Type $\rm{III}$ for $\beta\in\mathbb{F}^*_{2^n}$
 $\overline{\mathbf{1}}$ $\overline{\mathbf{2}}$ $\overline{\mathbf{3}}$ $\overline{\mathbf{4}}$ $\overline{\mathbf{5}}$ $\overline{\mathbf{6}}$ $\overline{\mathbf{7}}$ $\overline{\mathbf{8}}$ $\overline{\mathbf{9}}$ $\overline{\mathbf{10}}$ $\overline{\mathbf{11}}$ $\overline{\mathbf{12}}$ $E_{(12)}$ $E_{(13)}$ $E_{(14)}$ $E_{(21)}$ $E_{(23)}$ $E_{(24)}$ $E_{(31)}$ $E_{(32)}$ $E_{(34)}$ $E_{(41)}$ $E_{(42)}$ $E_{(43)}$
 $\overline{\mathbf{1}}$ $\overline{\mathbf{2}}$ $\overline{\mathbf{3}}$ $\overline{\mathbf{4}}$ $\overline{\mathbf{5}}$ $\overline{\mathbf{6}}$ $\overline{\mathbf{7}}$ $\overline{\mathbf{8}}$ $\overline{\mathbf{9}}$ $\overline{\mathbf{10}}$ $\overline{\mathbf{11}}$ $\overline{\mathbf{12}}$ $E_{(12)}$ $E_{(13)}$ $E_{(14)}$ $E_{(21)}$ $E_{(23)}$ $E_{(24)}$ $E_{(31)}$ $E_{(32)}$ $E_{(34)}$ $E_{(41)}$ $E_{(42)}$ $E_{(43)}$
Dividing the $32$ paths into $6$ classes
 $1$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{11}}, \overline{\mathbf{7}}, \overline{\mathbf{3}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{11}}, \overline{\mathbf{7}}, \overline{\mathbf{3}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $2$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $3$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{2}}, \overline{\mathbf{6}}, \overline{\mathbf{8}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{2}}, \overline{\mathbf{6}}, \overline{\mathbf{8}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $4$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{10}}, \overline{\mathbf{8}}, \overline{\mathbf{6}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{10}}, \overline{\mathbf{8}}, \overline{\mathbf{6}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$ $5$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $6$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{5}}, \overline{\mathbf{3}}, \overline{\mathbf{7}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{5}}, \overline{\mathbf{3}}, \overline{\mathbf{7}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$
 $1$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{11}}, \overline{\mathbf{7}}, \overline{\mathbf{3}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{11}}, \overline{\mathbf{7}}, \overline{\mathbf{3}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $2$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{1}}, \overline{\mathbf{9}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{5}}, \overline{\mathbf{10}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}}, \overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{5}})$ $3$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{2}}, \overline{\mathbf{6}}, \overline{\mathbf{8}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{2}}, \overline{\mathbf{6}}, \overline{\mathbf{8}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{4}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{1}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{12}}, \overline{\mathbf{4}})$ $4$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{8}}, \overline{\mathbf{10}}, \overline{\mathbf{6}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{10}}, \overline{\mathbf{8}}, \overline{\mathbf{6}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{10}}, \overline{\mathbf{8}}, \overline{\mathbf{6}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$ $5$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{4}}, \overline{\mathbf{9}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{2}}, \overline{\mathbf{11}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}}, \overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{2}})$ $6$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{3}}, \overline{\mathbf{5}}, \overline{\mathbf{7}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{5}}, \overline{\mathbf{3}}, \overline{\mathbf{7}}, \overline{\mathbf{1}}, \overline{\mathbf{12}})$ $(\overline{\mathbf{9}}, \overline{\mathbf{4}}, \overline{\mathbf{11}}, \overline{\mathbf{5}}, \overline{\mathbf{3}}, \overline{\mathbf{7}}, \overline{\mathbf{12}}, \overline{\mathbf{1}})$
The minimal polynomial is $x^4+x+1 = 0$ and $A = \mathrm{companion}(1, 1, 0, 0)$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $2$ $A$ $A + I + A^3$ $I + A^3$ $A^3$ $A$ $A + A^3$ $A^3$ $I + A^3$ $3$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $4$ $I$ $A^2 + A^3$ $I + A^2 + A^3$ $A^2$ $I$ $I + A^2$ $A^2$ $I + A^2 + A^3$ $5$ $I + A^3$ $A + I + A^3$ $A$ $A + I$ $I + A^3$ $A + A^3$ $A + I$ $A$ $6$ $I$ $A^2 + A^3$ $I + A^2 + A^3$ $A^2$ $I$ $I + A^2$ $A^2$ $I + A^2 + A^3$ $7$ $I$ $A + I$ $A$ $A$ $A^2$ $A + A^2$ $A + I$ $I$ $8$ $I$ $A + I$ $A$ $A$ $A$ $A + I$ $A^3$ $I + A^3$ $9$ $I$ $A^3$ $I + A^3$ $I + A^3$ $I + A^3$ $A^3$ $A + I$ $A$ $10$ $I$ $A^3$ $I + A^3$ $I + A^3$ $I + A^2 + A^3$ $A^2$ $A^3$ $I$ No. $M_{31}$ $M_{32}$ $M_{33}$ $M_{34}$ $M_{41}$ $M_{42}$ $M_{43}$ $M_{44}$ $1$ $A$ $A$ $I$ $I$ $A$ $A + A^2$ $I + A^2$ $A + I + A^2$ $2$ $I$ $I$ $A$ $A$ $I$ $A^3$ $A + I + A^3$ $A + A^3$ $3$ $I$ $I$ $I + A^3$ $I + A^3$ $I$ $A + I$ $A + I + A^3$ $A + A^3$ $4$ $I$ $I$ $A$ $A$ $I$ $A^3$ $A + I + A^3$ $A + A^3$ $5$ $I$ $I$ $I + A^3$ $I + A^3$ $I$ $A + I$ $A + I + A^3$ $A + A^3$ $6$ $I + A^3$ $I + A^3$ $I$ $I$ $I + A^3$ $A^2$ $A^2 + A^3$ $I + A^2$ $7$ $A^2$ $A^2$ $I$ $A + I$ $A + I$ $I$ $A$ $A + I$ $8$ $A$ $A$ $I + A^3$ $A^3$ $A + I$ $I$ $A$ $A + I$ $9$ $I + A^3$ $I + A^3$ $A$ $A + I$ $A^3$ $I$ $I + A^3$ $A^3$ $10$ $I + A^2 + A^3$ $I + A^2 + A^3$ $I$ $A^3$ $A^3$ $I$ $I + A^3$ $A^3$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $2$ $A$ $A + I + A^3$ $I + A^3$ $A^3$ $A$ $A + A^3$ $A^3$ $I + A^3$ $3$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $4$ $I$ $A^2 + A^3$ $I + A^2 + A^3$ $A^2$ $I$ $I + A^2$ $A^2$ $I + A^2 + A^3$ $5$ $I + A^3$ $A + I + A^3$ $A$ $A + I$ $I + A^3$ $A + A^3$ $A + I$ $A$ $6$ $I$ $A^2 + A^3$ $I + A^2 + A^3$ $A^2$ $I$ $I + A^2$ $A^2$ $I + A^2 + A^3$ $7$ $I$ $A + I$ $A$ $A$ $A^2$ $A + A^2$ $A + I$ $I$ $8$ $I$ $A + I$ $A$ $A$ $A$ $A + I$ $A^3$ $I + A^3$ $9$ $I$ $A^3$ $I + A^3$ $I + A^3$ $I + A^3$ $A^3$ $A + I$ $A$ $10$ $I$ $A^3$ $I + A^3$ $I + A^3$ $I + A^2 + A^3$ $A^2$ $A^3$ $I$ No. $M_{31}$ $M_{32}$ $M_{33}$ $M_{34}$ $M_{41}$ $M_{42}$ $M_{43}$ $M_{44}$ $1$ $A$ $A$ $I$ $I$ $A$ $A + A^2$ $I + A^2$ $A + I + A^2$ $2$ $I$ $I$ $A$ $A$ $I$ $A^3$ $A + I + A^3$ $A + A^3$ $3$ $I$ $I$ $I + A^3$ $I + A^3$ $I$ $A + I$ $A + I + A^3$ $A + A^3$ $4$ $I$ $I$ $A$ $A$ $I$ $A^3$ $A + I + A^3$ $A + A^3$ $5$ $I$ $I$ $I + A^3$ $I + A^3$ $I$ $A + I$ $A + I + A^3$ $A + A^3$ $6$ $I + A^3$ $I + A^3$ $I$ $I$ $I + A^3$ $A^2$ $A^2 + A^3$ $I + A^2$ $7$ $A^2$ $A^2$ $I$ $A + I$ $A + I$ $I$ $A$ $A + I$ $8$ $A$ $A$ $I + A^3$ $A^3$ $A + I$ $I$ $A$ $A + I$ $9$ $I + A^3$ $I + A^3$ $A$ $A + I$ $A^3$ $I$ $I + A^3$ $A^3$ $10$ $I + A^2 + A^3$ $I + A^2 + A^3$ $I$ $A^3$ $A^3$ $I$ $I + A^3$ $A^3$
The decompositions of $10$ classes of MDS matrices with $8n+3$ sw-xor
 $M_1$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})E_{(4)}(A)\overline{\mathbf{11}}(\mathbf{1}) \overline{\mathbf{7}}(A)E_{(2)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_2$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})\overline{\mathbf{11}}(A^{-1})E_{(1)}(A) \overline{\mathbf{7}}(\mathbf{1})E_{(3)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_3$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(A)\overline{\mathbf{11}}(\mathbf{1}) \overline{\mathbf{7}}(\mathbf{1})E_{(2)}(A)E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_4$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(A^{-1})\overline{\mathbf{11}}(\mathbf{1})E_{(2)}(A^{-\mathbf{1}}) \overline{\mathbf{7}}(\mathbf{1})E_{(3)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_5$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})\overline{\mathbf{11}}(A)E_{(1)}(A^{-1}) \overline{\mathbf{7}}(\mathbf{1})E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_6$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})E_{(4)}(A^{-1})\overline{\mathbf{11}}(\mathbf{1}) \overline{\mathbf{7}}(A^{-1})E_{(2)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_7$ $\overline{\mathbf{10}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(A)\overline{\mathbf{\mathbf{1}}}(\mathbf{1}) \overline{\mathbf{10}}(A)E_{(2)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_8$ $\overline{\mathbf{\mathbf{1}0}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(A) \overline{\mathbf{\mathbf{1}0}}(A)E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_9$ $\overline{\mathbf{10}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(A^{-1}) \overline{\mathbf{10}}(A^{-1})E_{(3)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_{10}$ $\overline{\mathbf{10}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(A^{-1})\overline{\mathbf{1}}(\mathbf{1}) \overline{\mathbf{10}}(A^{-1})E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$
 $M_1$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})E_{(4)}(A)\overline{\mathbf{11}}(\mathbf{1}) \overline{\mathbf{7}}(A)E_{(2)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_2$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})\overline{\mathbf{11}}(A^{-1})E_{(1)}(A) \overline{\mathbf{7}}(\mathbf{1})E_{(3)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_3$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(A)\overline{\mathbf{11}}(\mathbf{1}) \overline{\mathbf{7}}(\mathbf{1})E_{(2)}(A)E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_4$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(A^{-1})\overline{\mathbf{11}}(\mathbf{1})E_{(2)}(A^{-\mathbf{1}}) \overline{\mathbf{7}}(\mathbf{1})E_{(3)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_5$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})\overline{\mathbf{11}}(A)E_{(1)}(A^{-1}) \overline{\mathbf{7}}(\mathbf{1})E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_6$ $\overline{\mathbf{12}}(\mathbf{1})\overline{\mathbf{4}}(\mathbf{1})\overline{\mathbf{3}}(\mathbf{1})E_{(4)}(A^{-1})\overline{\mathbf{11}}(\mathbf{1}) \overline{\mathbf{7}}(A^{-1})E_{(2)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_7$ $\overline{\mathbf{10}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(A)\overline{\mathbf{\mathbf{1}}}(\mathbf{1}) \overline{\mathbf{10}}(A)E_{(2)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_8$ $\overline{\mathbf{\mathbf{1}0}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(A) \overline{\mathbf{\mathbf{1}0}}(A)E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_9$ $\overline{\mathbf{10}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(A^{-1}) \overline{\mathbf{10}}(A^{-1})E_{(3)}(A)\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{\mathbf{1}}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$ $M_{10}$ $\overline{\mathbf{10}}(\mathbf{1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{9}}(A^{-1})\overline{\mathbf{1}}(\mathbf{1}) \overline{\mathbf{10}}(A^{-1})E_{(3)}(A^{-1})\overline{\mathbf{5}}(\mathbf{1})\overline{\mathbf{1}}(\mathbf{1})\overline{\mathbf{9}}(\mathbf{1})$
The minimal polynomial is $x^8+x^2+1 = 0$ and $A = \mathrm{companion}(1, 0, 1, 0, 0, 0, 0, 0)$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $2$ $A$ $A^7$ $A + A^7$ $A + I + A^7$ $A$ $I + A^7$ $A + I + A^7$ $A + A^7$ $3$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $4$ $I$ $A^6$ $I + A^6$ $A + I + A^6 + A^7$ $I$ $A + A^6 + A^7$ $A + I + A^6 + A^7$ $I + A^6$ $5$ $A + A^7$ $A^7$ $A$ $A + I$ $A + A^7$ $I + A^7$ $A + I$ $A$ $6$ $I$ $A^6$ $I + A^6$ $A + I + A^6 + A^7$ $I$ $A + A^6 + A^7$ $A + I + A^6 + A^7$ $I + A^6$ $7$\thanks $I$ $A + I$ $A$ $A$ $A^2$ $A + A^2$ $A + I$ $I$ $8$ $I$ $A + I$ $A$ $A$ $A$ $A + I$ $A + I + A^7$ $A + A^7$ $9$ $I$ $A + I + A^7$ $A + A^7$ $A + A^7$ $A + A^7$ $A + I + A^7$ $A + I$ $A$ $10$ $I$ $A + I + A^7$ $A + A^7$ $A + A^7$ $I + A^6$ $A + I + A^6 + A^7$ $A + I + A^7$ $I$ No. $M_{31}$ $M_{32}$ $M_{33}$ $M_{34}$ $M_{41}$ $M_{42}$ $M_{43}$ $M_{44}$ $1$ $A$ $A$ $I$ $I$ $A$ $A + A^2$ $I + A^2$ $A + I + A^2$ $2$ $I$ $I$ $A$ $A$ $I$ $A + I + A^7$ $A^7$ $I + A^7$ $3$ $I$ $I$ $A + A^7$ $A + A^7$ $I$ $A + I$ $A^7$ $I + A^7$ $4$ $I$ $I$ $A$ $A$ $I$ $A + I + A^7$ $A^7$ $I + A^7$ $5$ $I$ $I$ $A + A^7$ $A + A^7$ $I$ $A + I$ $A^7$ $I + A^7$ $6$ $A + A^7$ $A + A^7$ $I$ $I$ $A + A^7$ $A + I + A^6 + A^7$ $A^6$ $A + A^6 + A^7$ $7$ $A^2$ $A^2$ $I$ $A + I$ $A + I$ $I$ $A$ $A + I$ $8$ $A$ $A$ $A + A^7$ $A + I + A^7$ $A + I$ $I$ $A$ $A + I$ $9$ $A + A^7$ $A + A^7$ $A$ $A + I$ $A + I + A^7$ $I$ $A + A^7$ $A + I + A^7$ $10$ $I + A^6$ $I + A^6$ $I$ $A + I + A^7$ $A + I + A^7$ $I$ $A + A^7$ $A + I + A^7$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $2$ $A$ $A^7$ $A + A^7$ $A + I + A^7$ $A$ $I + A^7$ $A + I + A^7$ $A + A^7$ $3$ $I$ $I + A^2$ $A^2$ $A + A^2$ $I$ $A + I + A^2$ $A + A^2$ $A^2$ $4$ $I$ $A^6$ $I + A^6$ $A + I + A^6 + A^7$ $I$ $A + A^6 + A^7$ $A + I + A^6 + A^7$ $I + A^6$ $5$ $A + A^7$ $A^7$ $A$ $A + I$ $A + A^7$ $I + A^7$ $A + I$ $A$ $6$ $I$ $A^6$ $I + A^6$ $A + I + A^6 + A^7$ $I$ $A + A^6 + A^7$ $A + I + A^6 + A^7$ $I + A^6$ $7$\thanks $I$ $A + I$ $A$ $A$ $A^2$ $A + A^2$ $A + I$ $I$ $8$ $I$ $A + I$ $A$ $A$ $A$ $A + I$ $A + I + A^7$ $A + A^7$ $9$ $I$ $A + I + A^7$ $A + A^7$ $A + A^7$ $A + A^7$ $A + I + A^7$ $A + I$ $A$ $10$ $I$ $A + I + A^7$ $A + A^7$ $A + A^7$ $I + A^6$ $A + I + A^6 + A^7$ $A + I + A^7$ $I$ No. $M_{31}$ $M_{32}$ $M_{33}$ $M_{34}$ $M_{41}$ $M_{42}$ $M_{43}$ $M_{44}$ $1$ $A$ $A$ $I$ $I$ $A$ $A + A^2$ $I + A^2$ $A + I + A^2$ $2$ $I$ $I$ $A$ $A$ $I$ $A + I + A^7$ $A^7$ $I + A^7$ $3$ $I$ $I$ $A + A^7$ $A + A^7$ $I$ $A + I$ $A^7$ $I + A^7$ $4$ $I$ $I$ $A$ $A$ $I$ $A + I + A^7$ $A^7$ $I + A^7$ $5$ $I$ $I$ $A + A^7$ $A + A^7$ $I$ $A + I$ $A^7$ $I + A^7$ $6$ $A + A^7$ $A + A^7$ $I$ $I$ $A + A^7$ $A + I + A^6 + A^7$ $A^6$ $A + A^6 + A^7$ $7$ $A^2$ $A^2$ $I$ $A + I$ $A + I$ $I$ $A$ $A + I$ $8$ $A$ $A$ $A + A^7$ $A + I + A^7$ $A + I$ $I$ $A$ $A + I$ $9$ $A + A^7$ $A + A^7$ $A$ $A + I$ $A + I + A^7$ $I$ $A + A^7$ $A + I + A^7$ $10$ $I + A^6$ $I + A^6$ $I$ $A + I + A^7$ $A + I + A^7$ $I$ $A + A^7$ $A + I + A^7$
The minimal polynomial is $x^4+x+1 = 0$ and $A = \mathrm{companion}(1, 1, 0, 0)$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I + A^2 + A^3$ $A + I + A^3$ $A + I$ $A + A^3$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $I$ $A^3$ $2$ $I + A^3$ $A + I + A^2 + A^3$ $A^2 + A^3$ $A + A^2 + A^3$ $I + A^3$ $I + A^2 + A^3$ $A^3$ $A + A^3$ $3$ $I + A^3$ $A + I + A^2 + A^3$ $A + A^2$ $A + I + A^2$ $I + A^3$ $I + A^2 + A^3$ $A^2$ $I + A^2$ $4$ $I$ $A$ $A + I$ $A + I + A^2$ $I$ $A + I$ $A$ $A + A^2$ $5$ $I + A^3$ $A + I + A^2 + A^3$ $A + A^2$ $A^2$ $I + A^3$ $I + A^2 + A^3$ $A^2$ $A + A^2$ $6$ $I + A^2 + A^3$ $A^2 + A^3$ $A + I$ $A + A^3$ $I + A^3$ $A + I + A^2 + A^3$ $A$ $A + I$ $7$ $I$ $A^2$ $I + A^2$ $A + I + A^2$ $I$ $I + A^2$ $A^2$ $A + A^2$ $8$ $I + A^2 + A^3$ $A + I + A^3$ $A + A^2$ $A + I + A^2$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $A$ $A + I$ $9$ $I$ $A$ $A + I$ $A + A^3$ $I$ $A + I$ $A$ $A + I$ $10$ $I$ $A$ $A^3$ $A + A^3$ $I$ $A + I$ $I$ $A + I$ No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^2$ $A + I$ $A$ $I$ $I$ $I$ $I$ $2$ $I$ $A + I$ $I + A^2$ $A^2$ $I$ $I$ $I$ $I$ $3$ $A$ $A + A^2$ $I + A^2$ $A^2$ $A$ $A$ $I$ $I$ $4$ $I + A^3$ $A + I + A^3$ $A + I + A^2 + A^3$ $A + I + A^3$ $I + A^3$ $I + A^3$ $I + A^2 + A^3$ $I + A^2 + A^3$ $5$ $I$ $I + A^2$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $I$ $I$ $I + A^3$ $I + A^3$ $6$ $I$ $A + I + A^3$ $A + I$ $A$ $I$ $I + A^3$ $I$ $I$ $7$ $A$ $A + A^2$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $A$ $A$ $I + A^3$ $I + A^3$ $8$ $I + A^3$ $A + I + A^3$ $A + I$ $A$ $I + A^3$ $I + A^3$ $I$ $I$ $9$ $I + A^3$ $A + I + A^3$ $A + I + A^2 + A^3$ $A^2 + A^3$ $I$ $I$ $I + A^3$ $I + A^2 + A^3$ $10$ $I$ $I + A^2$ $A + I + A^2 + A^3$ $A + I + A^3$ $I$ $I$ $I + A^2 + A^3$ $I + A^2 + A^3$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I + A^2 + A^3$ $A + I + A^3$ $A + I$ $A + A^3$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $I$ $A^3$ $2$ $I + A^3$ $A + I + A^2 + A^3$ $A^2 + A^3$ $A + A^2 + A^3$ $I + A^3$ $I + A^2 + A^3$ $A^3$ $A + A^3$ $3$ $I + A^3$ $A + I + A^2 + A^3$ $A + A^2$ $A + I + A^2$ $I + A^3$ $I + A^2 + A^3$ $A^2$ $I + A^2$ $4$ $I$ $A$ $A + I$ $A + I + A^2$ $I$ $A + I$ $A$ $A + A^2$ $5$ $I + A^3$ $A + I + A^2 + A^3$ $A + A^2$ $A^2$ $I + A^3$ $I + A^2 + A^3$ $A^2$ $A + A^2$ $6$ $I + A^2 + A^3$ $A^2 + A^3$ $A + I$ $A + A^3$ $I + A^3$ $A + I + A^2 + A^3$ $A$ $A + I$ $7$ $I$ $A^2$ $I + A^2$ $A + I + A^2$ $I$ $I + A^2$ $A^2$ $A + A^2$ $8$ $I + A^2 + A^3$ $A + I + A^3$ $A + A^2$ $A + I + A^2$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $A$ $A + I$ $9$ $I$ $A$ $A + I$ $A + A^3$ $I$ $A + I$ $A$ $A + I$ $10$ $I$ $A$ $A^3$ $A + A^3$ $I$ $A + I$ $I$ $A + I$ No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^2$ $A + I$ $A$ $I$ $I$ $I$ $I$ $2$ $I$ $A + I$ $I + A^2$ $A^2$ $I$ $I$ $I$ $I$ $3$ $A$ $A + A^2$ $I + A^2$ $A^2$ $A$ $A$ $I$ $I$ $4$ $I + A^3$ $A + I + A^3$ $A + I + A^2 + A^3$ $A + I + A^3$ $I + A^3$ $I + A^3$ $I + A^2 + A^3$ $I + A^2 + A^3$ $5$ $I$ $I + A^2$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $I$ $I$ $I + A^3$ $I + A^3$ $6$ $I$ $A + I + A^3$ $A + I$ $A$ $I$ $I + A^3$ $I$ $I$ $7$ $A$ $A + A^2$ $I + A^2 + A^3$ $A + I + A^2 + A^3$ $A$ $A$ $I + A^3$ $I + A^3$ $8$ $I + A^3$ $A + I + A^3$ $A + I$ $A$ $I + A^3$ $I + A^3$ $I$ $I$ $9$ $I + A^3$ $A + I + A^3$ $A + I + A^2 + A^3$ $A^2 + A^3$ $I$ $I$ $I + A^3$ $I + A^2 + A^3$ $10$ $I$ $I + A^2$ $A + I + A^2 + A^3$ $A + I + A^3$ $I$ $I$ $I + A^2 + A^3$ $I + A^2 + A^3$
The minimal polynomial is $x^8+x^2+1 = 0$ and $A = \mathrm{companion}(1, 0, 1, 0, 0, 0, 0, 0)$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I + A^4 + A^6$ $A^2+ I + A^6$ $A^2+ I$ $A^2+ A^6$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $I$ $A^6$ $2$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^4 + A^6$ $A^2+ A^4 + A^6$ $I + A^6$ $I + A^4 + A^6$ $A^6$ $A^2+ A^6$ $3$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^2+ A^4$ $A^2+ I + A^4$ $I + A^6$ $I + A^4 + A^6$ $A^4$ $I + A^4$ $4$ $I$ $A^2$ $A^2+ I$ $A^2+ I + A^4$ $I$ $A^2+ I$ $A^2$ $A^2+ A^4$ $5$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^2+ A^4$ $A^4$ $I + A^6$ $I + A^4 + A^6$ $A^4$ $A^2+ A^4$ $6$ $I + A^4 + A^6$ $A^4 + A^6$ $A^2+ I$ $A^2+ A^6$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^2$ $A^2+ I$ $7$ $I$ $A^4$ $I + A^4$ $A^2+ I + A^4$ $I$ $I + A^4$ $A^4$ $A^2+ A^4$ $8$ $I + A^4 + A^6$ $A^2+ I + A^6$ $A^2+ A^4$ $A^2+ I + A^4$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $A^2$ $A^2+ I$ $9$ $I$ $A^2$ $A^2+ I$ $A^2+ A^6$ $I$ $A^2+ I$ $A^2$ $A^2+ I$ $10$ $I$ $A^2$ $A^6$ $A^2+ A^6$ $I$ $A^2+ I$ $I$ $A^2+ I$ No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^4$ $A^2+ I$ $A^2$ $I$ $I$ $I$ $I$ $2$ $I$ $A^2+ I$ $I + A^4$ $A^4$ $I$ $I$ $I$ $I$ $3$ $A^2$ $A^2+ A^4$ $I + A^4$ $A^4$ $A^2$ $A^2$ $I$ $I$ $4$ $I + A^6$ $A^2+ I + A^6$ $A^2+ I + A^4 + A^6$ $A^2+ I + A^6$ $I + A^6$ $I + A^6$ $I + A^4 + A^6$ $I + A^4 + A^6$ $5$ $I$ $I + A^4$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $I$ $I$ $I + A^6$ $I + A^6$ $6$ $I$ $A^2+ I + A^6$ $A^2+ I$ $A^2$ $I$ $I + A^6$ $I$ $I$ $7$ $A^2$ $A^2+ A^4$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $A^2$ $A^2$ $I + A^6$ $I + A^6$ $8$ $I + A^6$ $A^2+ I + A^6$ $A^2+ I$ $A^2$ $I + A^6$ $I + A^6$ $I$ $I$ $9$ $I + A^6$ $A^2+ I + A^6$ $A^2+ I + A^4 + A^6$ $A^4 + A^6$ $I$ $I$ $I + A^6$ $I + A^4 + A^6$ $10$ $I$ $I + A^4$ $A^2+ I + A^4 + A^6$ $A^2+ I + A^6$ $I$ $I$ $I + A^4 + A^6$ $I + A^4 + A^6$
 No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I + A^4 + A^6$ $A^2+ I + A^6$ $A^2+ I$ $A^2+ A^6$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $I$ $A^6$ $2$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^4 + A^6$ $A^2+ A^4 + A^6$ $I + A^6$ $I + A^4 + A^6$ $A^6$ $A^2+ A^6$ $3$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^2+ A^4$ $A^2+ I + A^4$ $I + A^6$ $I + A^4 + A^6$ $A^4$ $I + A^4$ $4$ $I$ $A^2$ $A^2+ I$ $A^2+ I + A^4$ $I$ $A^2+ I$ $A^2$ $A^2+ A^4$ $5$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^2+ A^4$ $A^4$ $I + A^6$ $I + A^4 + A^6$ $A^4$ $A^2+ A^4$ $6$ $I + A^4 + A^6$ $A^4 + A^6$ $A^2+ I$ $A^2+ A^6$ $I + A^6$ $A^2+ I + A^4 + A^6$ $A^2$ $A^2+ I$ $7$ $I$ $A^4$ $I + A^4$ $A^2+ I + A^4$ $I$ $I + A^4$ $A^4$ $A^2+ A^4$ $8$ $I + A^4 + A^6$ $A^2+ I + A^6$ $A^2+ A^4$ $A^2+ I + A^4$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $A^2$ $A^2+ I$ $9$ $I$ $A^2$ $A^2+ I$ $A^2+ A^6$ $I$ $A^2+ I$ $A^2$ $A^2+ I$ $10$ $I$ $A^2$ $A^6$ $A^2+ A^6$ $I$ $A^2+ I$ $I$ $A^2+ I$ No. $M_{11}$ $M_{12}$ $M_{13}$ $M_{14}$ $M_{21}$ $M_{22}$ $M_{23}$ $M_{24}$ $1$ $I$ $I + A^4$ $A^2+ I$ $A^2$ $I$ $I$ $I$ $I$ $2$ $I$ $A^2+ I$ $I + A^4$ $A^4$ $I$ $I$ $I$ $I$ $3$ $A^2$ $A^2+ A^4$ $I + A^4$ $A^4$ $A^2$ $A^2$ $I$ $I$ $4$ $I + A^6$ $A^2+ I + A^6$ $A^2+ I + A^4 + A^6$ $A^2+ I + A^6$ $I + A^6$ $I + A^6$ $I + A^4 + A^6$ $I + A^4 + A^6$ $5$ $I$ $I + A^4$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $I$ $I$ $I + A^6$ $I + A^6$ $6$ $I$ $A^2+ I + A^6$ $A^2+ I$ $A^2$ $I$ $I + A^6$ $I$ $I$ $7$ $A^2$ $A^2+ A^4$ $I + A^4 + A^6$ $A^2+ I + A^4 + A^6$ $A^2$ $A^2$ $I + A^6$ $I + A^6$ $8$ $I + A^6$ $A^2+ I + A^6$ $A^2+ I$ $A^2$ $I + A^6$ $I + A^6$ $I$ $I$ $9$ $I + A^6$ $A^2+ I + A^6$ $A^2+ I + A^4 + A^6$ $A^4 + A^6$ $I$ $I$ $I + A^6$ $I + A^4 + A^6$ $10$ $I$ $I + A^4$ $A^2+ I + A^4 + A^6$ $A^2+ I + A^6$ $I$ $I$ $I + A^4 + A^6$ $I + A^4 + A^6$
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