15
-12 -6 11 -2
-12 4 15 5
-2 -10 10 -1
9 -15 11 13
-13 -11 1 -7
-1 -12 8 4
-9 -12 8 -4
-11 3 4 15
-10 -10 -1 -6
-7 -9 -6 4
-7 -11 11 6
-7 -15 0 -12
-6 -15 14 9
-15 -12 -3 1
-8 8 -1 14