length n = 21
dimension k = 7
alphabet length q = 3

minimum distance d = 9

generator matrix:

0	0	0	0	1	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
0	0	0	1	0	1	0	1	1	1	1	1	1	1	1	2	2	2	2	2	2
0	0	1	0	0	1	1	0	1	1	1	1	2	2	2	1	1	1	2	2	2
0	1	0	0	0	1	1	1	0	1	1	2	1	2	2	1	2	2	1	1	2
1	0	0	0	0	1	1	1	1	0	1	2	2	1	2	2	1	2	1	2	1
0	0	0	0	0	1	1	1	1	1	0	2	2	2	1	2	2	1	2	1	1
2	2	2	2	2	1	1	1	1	1	1	1	2	2	1	2	1	2	1	1	2

by truncation of 22