#g2 f1

6x6
1 1 0 0 0 0
0 -1 0 0 0 0
0 2 1 0 0 0
0 -2 0 1 0 0
0 1 0 0 1 0
0 1 0 0 0 1

6x6
-1 0 0 0 0 0
1 0 0 0 1 -1
0 1 0 0 -1 1
0 0 1 0 1 -1
0 0 0 1 0 1
0 0 0 0 -1 0

6x6
2 1 0 0 0 0
1 2 1 0 0 0
0 1 2 1 0 0
0 0 1 2 1 1
0 0 0 1 2 0
0 0 0 1 0 2

2^10 * 3^2 * 5 = 46080
dim6/6-1b

