3
2
1
1
4
2
1
1
5
2
1
1
6
2
1
1
7
2
1
1
9
2
1
1
14
2
1
1
15
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
