#2

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

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

dim6/4-2;2-2a

