C 20
0 0
1 0
1 0.5
2 0.5
2 0
10 0
10 4
8 4
8 5
9 5
9 6
4 6
4 5
6 5
6 4
2 4
2 3.5
1 3.5
1 4
0 4
H 12
2.8 1.1
4 1.1
4 1.6
7.8 1.6
7.8 1.1
9 1.1
9 3
7.8 3
7.8 2.5
4 2.5
4 3
2.8 3