length n = 21
dimension k = 12
alphabet length q = 2

minimum distance d = 4

generator matrix:
000000011111111000000
001111100000111010111
110011101111111101011
001100011111001101011
001100110001001010111
000101100010000111100
000111000010110111100
010110000110010000000
111011010111111111100
101011100010011010111
010101100011101111100
011111001001111010111

projective group of automorphisms generated by:
011101110100
110110011010
110001000010
001000011101
010101001001
010110000001
011011111011
010100100000
000101000110
111011010010
111111111000
101000011111