#2

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

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

dim6/3;1,1,1a

