30-17

0 0
-1 1
1 0
2 0
3 0
3 1
-1 2
4 1
4 0
0 -1
5 -1
-1 -1
4 -1
-1 -2
6 -1
7 -1
-2 -2
0 -3
0 -2
2 1
-2 -3
0 1
4 -2
0 2
1 -3
3 -2
2 -1
-2 3
-1 0
3 2