1
2
1
1
3
2
1
1
7
2
1
1
8
2
1
1
9
2
1
1
10
2
1
1
12
2
1
1
13
2
1
1
14
4
3
3
15
2
1
1
18
2
1
1
19
2
1
1
20
2
1
1
