1 0 0 0 0 0 0 -1
-1 1 0 0 0 0 0 0
0 -1 1 0 0 0 0 0
0 0 -1 1 0 0 0 0
0 0 0 -1 1 0 0 0
0 0 0 0 -1 1 0 0
0 0 0 0 0 -1 1 0
0 0 0 0 0 0 -1 1
1 0 0 0 0 0 1 0
0 1 0 0 0 1 0 0
0 0 1 0 1 0 0 0
0 0 0 1 0 0 0 1
