21
20
21
21
21
21
21
21
21
21
16
15
21
21
21
21
21
21
15
21
16
21
21
20
21
16
21
21
20
21
17
8
12
15
20
16
20
20
21
21
21
16
19
15
20
15
16
21
18
21
17
16
21
15
21
16
19
16
21
21
21
21
21
21
21
21
21
21
21
21
21
21
16
16
21
15
21
21
16
21
21
21
16
21
21
21
21
21
16
21
20
15
21
15
21
21
21
16
21
21