
8 8

0 3 0 2 1 -1 0 0
0 4 -1 3 2 0 -1 0
1 1 0 0 0 0 0 0
1 0 1 0 0 0 0 0 
1 0 0 1 0 0 0 0
1 0 0 0 1 0 0 0
1 0 0 0 0 1 0 0
1 0 0 0 0 0 1 0

2
