20
21
21
21
21
21
21
15
21
21
16
21
21
21
21
21
21
14
21
21
21
21
21
21
16
18
21
18
21
21
21
21
21
21
21
21
20
21
16
21
16
20
21
21
21
19
21
21
21
21
21
20
21
16
11
21
21
21
20
20
21
21
21
21
15
21
9
21
21
21
21
21
21
21
16
21
10
21
21
16
21
21
21
15
15
21
21
16
15
21
16
20
18
8
12
13
10
16
12
18