2
2
1
1
3
2
1
1
7
2
1
1
8
2
1
1
11
2
1
1
13
2
1
1
14
2
1
1
15
2
1
1
17
2
1
1
18
2
1
1
19
2
1
1
20
2
1
1
21
2
1
1
