#2

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

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

dim6/2-2,2-2;2-2a

