21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
15
21
21
21
21
21
21
21
21
21
21
20
21
21
17
21
20
20
14
21
15
21
21
21
21
21
21
21
15
15
21
21
20
21
17
16
17
21
17
21
21
17
21
10
21
21
21
17
21
21
21
21
21
21
21
21
19
20
21
21
21
21
21
21
12