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