1
21
20
20
2
2
1
1
4
2
1
1
5
2
1
1
7
2
1
1
8
2
1
1
9
2
1
1
11
2
1
1
12
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
20
2
1
1
21
2
1
1
23
2
1
1
24
2
1
1
