500

6, 3^ 3^ | 3 7 7 | 4 1^ 1^

5 2^ 2^ | 6,_ 1^_ 3^_ 6^_ 1^^_ 7^_ | [5^5] 7 3^

4_ 6_ 1^_ 4^_ [6^1^]_ 1^_ | [5^5] [7^2^] [1^^2^] | 6,_ 1^_ [33^]_ 6^_ [1^^3]_ [7^]_

[5^5] [3^7] 7 | [64] 1^ 1^ | [75] 2^ 2^

[6,6]_ 1^_ [3^3]_ 6^_ [1^^3]_ 7^_ | [5^5] 7 [3^7] | 4_ 6_ 1^_ 4^_ [6^1^]_ 1^_

[5^5] [7^2^] [1^^2^] | 6,_ 1^_ [3^3]_ 6^_ [1^^3]_ 7^_ | [5^5] [7^7] 5^

[4^4] 2^ 2^ | [6^6] 2^ 2^ | [46]_ 6^_ 6^_ 6^_ 6^_ 6^_

6^_ 6^^_ 6^^_ 6^^_ [6^^4]_ 6^^_ | [6^^13]_ 6^_ 6^_ 6^_ 6^_ 6^_ | [6^6]_ 6_ 6_ 6_ [1^6]_ 6_

[75]_ 1^_ [2^7] 7 | [2^36] [3^35] 7 | [1^13] [13] [13]

[77,5] [7,5] [7,5] | [631]_ 2^_ 2^_ 2^_ 2^_ 2^_ | 2^_ 7^_ 7^_ 7^_ [7^64]_ 7^_

[7^35]_ 1^_ 1^_ 1^_ 1^_ 1^_ | 1^3 [3^1^3] [1^^1^3] | 1^^_ 2^^_ 6^-  

1^^_ 2^^_ 6^- | 1^_ 2^_ [636,] [36,] | [636,] [36,] [36,]

[66,]_ [1^]_ [3^3]_ 6^_ [1^^3]_ 7^_ | [5^5] 7 [3^7] | 4_ 6_ 1^_ 4^_ [6^1^]_ 1^_

[5^5] [7^2^] [1^^2^] | [66,]_ 1^_ [3^3]_ 6^_ [1^^3]_ 7^_ | [5^5] [3^7] 7

[64] 1^ 1^ | 7 2^ 2^ | [66,]_ 1^_ [3^3]_ 6^_ [1^^3]_ 7^_

[5^5] [3^7] 7 | 4_ 6_ 1^_ 4^_ [6^1^]_ 1^_ | [5^5] [7^2^] [1^^2^]

[66,]_ 1^_ [3^3]_ 6^_ [1^^3]_ 7^_ | [5^5] [7^7] [5^5] | [4^4] 2^ 6

[2^2] 6 6 | [6^74]_ 7^_ 1^^_ 2^^_ 3^^ | [1^^]_ [6^4]_ [6^6]_ [6^4]_ [6^6]_ [6^4]_

[6^36,]_ 7^_ 1^^_ 2^^_ 3^^ | [1^^64] [6^6]_ [6^4]_ [6^6]_ [6^4]_ | [7^7]_ 1^_ [7^2^]_ 7_ [7^7]_ 5_

[7^2^]_ 7_ [7^3^5]_ 7^_ 7^_ 7^_ | [63]__ 1^^__ 3^^__ 6^^__ [1^^^63] [63] | [5#3]__ 7^__ 3^^__ 6^^#__ [7^^63] [63]

4_ 2^_ 2^_ 2^_ [2^7]_ 2^_ | 2^_ 2^^_ 2^^_ 2^^_ [2^^6]_ 2^^_ | 5_ 3^_ 3^_ 3^_ 3^_ 3^_

[31^1^^] [3^1^^] [3^1^^7]_ [3^1^1^^]_ | [1^^6]_ 2^^_ 6^- | 1^^^_ 2^^^_ [6^^6] 6,

[3^_3] 2^_ [63] [63] | [63] [63] [63]--