Binary (68,12)-code with minimal distance 24 

[10000000000111111111100000000001001000000000011111111110000000000100]
[01000000000111110000011111000001000100000000011111000001111100000100]
[00100000000111101000010000111101000010000000011110100001000011110100]
[00010000000110010110001100111001000001000000011001011000110011100100]
[00001000000110001101011010100011000000100000011000110101101010001100]
[00000100000101100100101001110011000000010000010110010010100111001100]
[00000010000101000011100100011111000000001000010100001110010001111100]
[00000001000011000101110101101001000000000100001100010111010110100100]
[00000000100010011001100111000111000000000010001001100110011100011100]
[00000000010001010110101011001101000000000001000101011010101100110100]
[00000000001000101110110010010111000000000000100010111011001001011100]
[00000000000000000000000000000000001111111111111111111111111111111111]