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