length n = 41
dimension k = 5
alphabet length q = 7

minimum distance d = 29

generator matrix:
00011111111111111111001111111111111111111
11100112222233345666110000112222233445566
22626340124605521134140146131344535262406
01353016031565634025162635531502256541405
60245530022165451502546551031642541102535

by truncation of 42