3
2
1
1
4
2
1
1
5
2
1
1
6
2
1
1
8
2
1
1
9
2
1
1
12
2
1
1
15
2
1
1
17
2
1
1
18
2
1
1
20
2
1
1
21
2
1
1
24
2
1
1
25
2
1
1
