4 6
0 0
4 0
4 7
0 7
0 0
0 -1
0 8
2 2
5 1
3 6
4 4
4 0
4 5
11 5
12 1
3 1
6 5
11 5
12 5
3 2
0 0
2 0
1 2
0 1
1 1
0 0
