20
3 0
0 2
7 -8
-3 -5
0 6
-9 -4
-5 -8
-8 4
8 2
7 7
-4 7
1 0
-7 0
-8 3
6 -9
-5 -1
-6 -5
1 -6
-6 2
-4 1
