16
21
20
17
21
21
21
21
17
21
21
16
15
21
16
21
15
16
16
16
21
21
15
20
15
17
20
17
16
21
21
16
15
21
21
21
21
21
20
16
16
16
21
21
21
16
16
15
21
21
21
21
15
21
21
21
15
21
21
21
21
21
21
14
21
15
21
21
15
21
21
16
21
16
21
15
15
21
21
21
16
18
9
21
21
16
15
21
21
16
21
15
16
16
21
20
21
15
15
21