15
-3 0 2 0 3 1 0 -1 3 0 2 -2 0 2 1
0 1 0 -2 -2 -2 -2 -2 1 0 0 0 1 -3 0
0 2 0 0 0 2 0 0 2 3 0 3 0 2 1
1 2 2 0 3 0 2 2 1 3 3 2 -1 3 0
-1 1 -2 3 1 -2 0 1 0 3 3 -3 0 -2 1
0 0 0 0 0 3 3 3 0 3 0 0 2 3 3
1 -1 2 -1 3 -1 2 -1 1 -1 2 -1 3 -1 2
2 0 0 0 2 0 0 0 0 0 0 0 0 0 0
0 0 2 0 0 0 0 0 0 0 0 0 0 2 0
0 2 0 0 0 0 2 0 0 0 0 0 0 0 0
0 0 0 2 2 0 0 0 0 0 0 0 0 0 0
0 0 0 0 2 0 2 0 0 0 0 0 0 0 0
0 2 0 0 0 0 0 0 0 0 0 2 0 0 0
0 0 0 0 2 2 0 0 0 0 0 0 0 0 0
3 1 3 2 3 2 2 0 2 -3 1 3 2 -2 -1