10
7
37
-10
-10 0  0 17 18 19 20  0  0 37
 1  0  0 16  0  0 21  0  0 36
 2  3  0 15  0  0 22  0 34 35
 0  4  0 14  0  0 23  0 33  0
 6  5  0 13  0  0 24  0 32 31
 7  0  0 12  0  0 25  0  0 30
 8  9 10 11  0  0 26 27 28 29

