1
2
1
1
2
2
1
1
3
2
1
1
4
2
1
1
5
2
1
1
8
2
1
1
14
2
1
1
18
2
1
1
19
2
1
1
20
2
1
1
21
2
1
1
23
2
1
1
25
2
1
1
