21
21
21
21
21
21
21
21
21
14
21
21
21
21
21
21
21
21
21
21
21
21
21
17
21
21
21
21
21
21
21
21
21
20
21
21
21
21
20
21
21
19
21
21
21
21
21
21
21
21
21
21
21
21
21
21
15
20
21
21
21
21
20
20
21
15
21
21
21
21
15
21
21
17
21
21
17
15
17
21
21
21
21
21
21
21
15
21
21
19
12
21
15
21
15
17
15
21
21
21