3
6
0 8
5 8
5 4
8 4
8 0
0 0
4
0 4
4 4
4 0
0 0
14
4 8
12 8
12 6
14 6
14 8
16 8
16 3
8 3
8 0
0 0
0 6
3 6
3 7
4 7