1 0 0 0 0 1 0 0 0 0 1 0
0 1 0 -1/4 1 0 0 1/4 0 0 -1 5/4
-1 0 0 0 0 -1 0 1/2 0 0 1 0
0 -1 0 1/4 -1 0 0 1/4 0 0 -1 5/4