Binary (91,4)-code with minimal distance 48 

[1111110000000000000000001111110000001111111111111111110000001111110000001111110000001111110]
[0000001111110000000000000000001111111111111111110000001111111111110000000000001111111111110]
[0000000000001111110000001111111111111111110000000000000000000000001111111111111111111111110]
[0000000000000000001111110000000000000000000000001111111111111111111111111111111111111111110]