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