21
21
21
21
20
21
21
21
21
21
21
21
21
16
21
21
21
21
21
21
16
16
21
21
21
21
17
21
18
21
18
21
20
21
21
21
18
21
21
15
15
21
21
21
19
15
15
21
21
21
21
21
20
21
21
21
21
21
21
21
18
16
21
21
21
21
21
21
20
21
12
21
21
16
21
21
15
21
21
21
21
21
21
21
21
21
21
16
18
21
21
21
21
21
21
21
21
16
21
21