30-21

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