4
4
0 0
3 0
0 3
1 1
7
0 0
1 0
2 0
-1 2
0 2
2 2
1 3
4
-0.01 0
0 1
0 -1
1 0
8
3 0
0 3
-3 0
0 -3
2 2
-2 2
2 -2
-2 -2