Binary (81,21)-code with minimal distance 21

[100000000000000000000010010011100100111001011111000001111110010101011001001000001]
[010000000000000000000101001001110010011100100000111111111110101011101100011010111]
[001000000000000000000010100100111001001110010000000000000000101010110110001101100]
[000100000000000000000110010101000111001001001000000000000001001100101010001110010]
[000010000000000000000011001010100011100100100100000000000000100110010101000111001]
[000001000000000000000001100101010001110010010010000000000000010011001010100011100]
[000000100000000000000111110101110011010111000001000000000001001111101011100110101]
[000000010000000000000000111101100010000101100000100000000001100001111011000100001]
[000000001000000000000000011110110001000010110000010000000000110000111101100010000]
[000000000100000000000111001000000011001111010000001000000001011110010000000110011]
[000000000010000000000100100011011010001001100000000100000001101001000110110100010]
[000000000001000000000010010001101101000100110000000010000000110100100011011010001]
[000000000000100000000101001000110110100010010000000001000000011010010001101101000]
[000000000000010000000101100011000000111111000000000000100001001011000110000001111]
[000000000000001000000001110110111011110001100000000000010001100011101101110111100]
[000000000000000100000000111011011101111000110000000000001000110001110110111011110]
[000000000000000010000100011101101110111100010000000000000100011000111011011101111]
[000000000000000001000110001110110111011110000000000000000010001100011101101110111]
[000000000000000000100000000000000000000000001111000001111111000001111110000001111]
[000000000000000000010000000000000000000000000000111111111110000001111111111110000]
[000000000000000000001000000000000000000000000000000000000000111111111111111111111]