21
21
21
21
21
21
21
15
21
21
21
21
20
21
21
21
21
15
21
15
21
21
21
21
11
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
19
21
15
21
15
21
21
16
21
21
21
21
21
15
21
15
15
21
21
21
21
21
21
21
21
21
15
21
15
21
15
16
21
21
21
21
21
20
21
21
21
21
21
21
15