4
4
0 0
0 5
5 5
5 0
4
2 3
1 6
5 5
0 3
3
-2 -2
2 2
2 -2
3
0 0
1 -1
-1 -1
5
0 0
0 10
5 10
10 10
10 0
4
5 10
1 9
1 11
6 10
4
-13 -13
-12 -2
-3 -3
-3 -13
3
-13 -3
-6 -13
-8 -8

