1 0 0 0 0 1 0 0 0 0 1 0
1 0 0 0 0 0 1 -1/2 0 1 0 1/2
1 0 0 0 0 -1 0 1/4 0 0 -1 5/4
1 0 0 0 0 0 -1 3/4 0 -1 0 3/4