length n = 68
dimension k = 6
alphabet length q = 4

minimum distance d = 46

generator matrix:
01111111111110111101111111111111101111000001111111111000111111111111
10000011111230000010001112223333310123111110001112333111000111233333
30111101223201012300031231221123313210111233331332022112122113201122
31023301011130222200122200231220301111001311333003203133312233032311
13110321232112023130222200123122110123232211022233223100132113322101
32300323102110222203023222312103231203221131120212333113320313232113

by truncation of 69