2
2
1
1
4
3
2
2
6
2
1
1
10
2
1
1
13
2
1
1
14
2
1
1
16
2
1
1
17
2
1
1
18
2
1
1
19
2
1
1
21
2
1
1
22
2
1
1
25
2
1
1
