8 8
0 1 1 1 1 1 1 1
1 -1 -1 3 -1 -1 3 -1
12 1 -11 -11 1 25 1 -11
12 -11 1 1 -11 25 -11 1
37 47 23 3 -13 -25 -33 -37
37 23 -13 -33 -37 -25 3 47
37 -13 -37 3 47 -25 -33 23
37 -37 47 -33 23 -25 3 -13
