15
21
21
15
16
21
21
20
16
21
21
21
16
21
18
16
16
17
21
21
16
21
18
21
17
16
16
21
17
20
21
14
21
17
20
21
21
21
21
16
21
16
21
21
15
14
21
21
20
16
21
17
20
21
21
21
15
21
21
21
21
21
16
19
20
21
17
18
21
21
21
21
20
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
16
21
21
16
9