3
2
1
1
4
2
1
1
5
2
1
1
7
2
1
1
8
2
1
1
12
2
1
1
13
2
1
1
15
2
1
1
16
2
1
1
18
2
1
1
20
2
1
1
22
2
1
1
23
2
1
1
