4

4
0.0 0.0
6.0 0.0
6.0 6.0
0.0 6.0

3
0.5 1.0
1.0 2.0
2.0 1.5

3
0.5 4.0
1.0 5.0
2.0 4.5

3
3.0 3.0
5.0 3.5
5.0 2.5


