12
4
2
2
7
2
6
3
1
1
2
3
2
2
2
1
4
1
3
1
2
1
1
2
5
1
2
1
3
4
1
1
6
2
7
1
1
8
1
2
6
5
3
3
4
5
4
7
5
2
4
1
2
1
4
1
13
8
1
3
2
5
2
1
3
2
1
1
3
1
5
2
3
4
5
1
2
1
3
3
2
1
Arch Bridge