30-29

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