-5000 -900 -500 -350 -300 -100 0 100 300 350 500 900 5000
2 1 0
0 0 -6 -4 0 0 0 -4
-1 -1 -5 -3 0 0 0 0
0 0 0 -3 -1 0 0 0
0 0 0 0 0 -1 0 0
0 0 3 5 -2 0 0 -1
0 0 0 0 1 0 0 1
1 1 1 2 0 1 0 0
0 4 3 0 0 4 6 0
0
 1  1  1  1  1  1  1  1