5
0 -1  0 -1 -1 -1  0
0 -1 -1  0  0  0  1
0  0  0  1 -1  2  0
0 -1  2  0 -1  0 -1
0 -1  1  0 -1  0  0
0
6 5 2
-1  0 -1
-1  0  0
-1 -1  0
-1  2  0
-1  1  0
 0  0  1
0 -1  0 -1 -1 -1  0 1
0 -1 -1  0  0  0  1 1
0 -1  2  0 -1  0 -1 1
0  0  0  1 -1  2  0 1
0 -1  1  0 -1  0  0 1
