30-6

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