Binary (46,7)-code with minimal distance 21 

[1000000111000110111000011101111000110000111100]
[0100000110110100100111010001000100111110111010]
[0010000101101010010110101000100010111101110101]
[0001000110101001011101101011101100010100001011]
[0000100010001111101010001100001101010111100111]
[0000010111111111000001111111111111111111100000]
[0000001000000000111111111111111111111111111111]