1 0 0 0 0 1 0 0 0 0 1 0
0 0 1 0 0 1 0 0 1 0 0 0
-1 0 0 1/4 0 1 0 0 0 0 -1 1/4
0 0 -1 1/4 0 1 0 0 -1 0 0 1/4