Binary (30,7)-code with minimal distance 12 

[100000011111111110000000001000]
[010000011111000001111100001000]
[001000011110100001000011111000]
[000100011001011000110011101000]
[000010010101010100001111011000]
[000001010010011011101010011000]
[000000101001101101010101011000]