P1 P2
0 0 -1 +1 +2 -2 -2 +2 +1 -1
+1 -1 0 0 -1 +1 +2 -2 -2 +2
-2 +2 +1 -1 0 0 -1 +1 +2 -2
+2 -2 -2 +2 +1 -1 0 0 -1 +1
-1 +1 +2 -2 -2 +2 +1 -1 0 0