30-31

0 0
0 1
-1 1
0 2
-1 0
0 3
-2 2
-2 0
-1 4
-1 5
-3 2
1 -1
-2 1
-4 3
2 -1
-4 4
1 3
0 5
-1 -1
2 2
-1 -2
2 0
3 -1
-2 4
-1 3
1 0
4 -2
-4 5
-3 1
0 -1