Binary (40,6)-code with minimal distance 18 

[1000000011110011111111111111100000000000]
[0100000110001010100110010101001011111010]
[0010001111110010011111001001011001100111]
[0001001101000111111010011010001010101011]
[0000100010011011110011110000011110000111]
[0000010000100100001111111110000001111111]