Binary (28,7)-code with minimal distance 12 

[1000000111111111100000000010]
[0100000111110000011111000010]
[0010000111101000010000111110]
[0001000110010110001100111010]
[0000100101010101000011110110]
[0000010100100110111010100110]
[0000001010011011010101010110]