21
21
21
21
21
21
21
21
21
21
21
15
21
21
21
21
21
16
21
21
21
9
16
16
15
15
15
16
21
21
15
17
16
16
21
21
15
16
16
21
20
21
21
12
21
21
21
19
20
16
21
21
16
16
21
21
16
15
15
15
18
21
15
17
16
21
21
16
21
16
16
21
21
21
21
21
21
21
21
16
12
21
21
16
16
21
20
15
21
21
15
16
11
15
21
21
12
16
20
12