Binary (31,22)-code with minimal distance 4

[1000000000000000000000101010011]
[0100000000000000000000101010101]
[0010000000000000000000101010110]
[0001000000000000000000101000001]
[0000100000000000000000101000010]
[0000010000000000000000101000100]
[0000001000000000000000101000111]
[0000000100000000000000001010001]
[0000000010000000000000001010010]
[0000000001000000000000001010100]
[0000000000100000000000001010111]
[0000000000010000000000100010111]
[0000000000001000000000100010100]
[0000000000000100000000100010010]
[0000000000000010000000100010001]
[0000000000000001000000100000110]
[0000000000000000100000100000101]
[0000000000000000010000100000011]
[0000000000000000001000000010110]
[0000000000000000000100000010101]
[0000000000000000000010000010011]
[0000000000000000000001000000111]