3
0 -1 -1 0 -1 0 0
0 -1 0 -1 -1 0 0
-1 -1 0 0 -1 -1 0 
0

3 3 2

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

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