21
21
21
21
21
21
21
21
21
21
21
16
21
21
21
16
21
11
21
21
21
15
20
21
21
11
21
17
20
14
21
21
21
21
12
20
21
21
16
21
21
21
20
21
21
21
21
17
21
21
21
21
21
21
21
21
21
21
13
16
16
16
21
21
21
21
21
16
21
21
21
21
17
16
16
21
15
21
15
21
21
21
21
16
21
21
21
21
18
21
21
17
21
21
20
15
12
21
9
16