21
21
21
16
21
21
21
21
21
21
21
21
21
20
21
21
21
15
21
20
21
21
21
21
16
17
21
21
21
21
21
16
21
15
21
16
21
21
21
15
16
21
21
21
21
21
21
21
16
21
16
21
21
16
21
21
21
21
11
17
21
16
16
21
21
16
21
21
21
20
16
15
21
21
15
21
21
16
21
16
21
19
21
21
21
16
16
20
17
12
21
16
14
20
21
19
19
21
21
19