0 -6
1 0
1 -1
1 -2
2 0
3 0
6 0
-6 0
-3 0
-2 0
-2 2
-2 4
-1 0
-1 1
-1 -1
-1 0
-2 -4
-2 -2
-2 0
-3 0
-6 0
6 0
3 0
2 0
1 2
1 1
1 0
0 6