length n = 20
dimension k = 6
alphabet length q = 7

minimum distance d = 8

generator matrix:
11111111111111111111
11111111222222444444
11222444111222111444
24122144122112144114
24212414212121414141
24221441221211441411

projective group of automorphisms generated by:
000001
100000
010000
001000
000100
000010

010000
100000
001000
000100
000010
000001