21
20
21
16
21
21
21
21
20
21
21
16
20
21
21
21
21
21
21
21
21
21
16
21
16
21
21
16
16
21
16
16
21
21
16
21
21
21
20
21
21
16
16
21
21
14
21
21
21
21
21
16
20
20
21
15
16
21
21
21
16
21
21
21
21
16
21
21
20
16
16
21
13
21
21
21
16
21
16
20
21
12
16
16
21
16
21
19
16
21
21
21
21
21
21
21
21
21
21
15