21
15
15
15
18
15
21
21
16
16
21
21
21
21
21
21
20
20
16
16
21
21
21
21
21
21
21
21
16
21
21
21
16
15
12
21
21
21
21
15
15
17
21
15
21
21
16
21
15
15
21
21
21
17
21
21
21
21
20
21
20
21
20
15
21
21
21
16
20
21
21
21
15
16
21
15
21
15
21
16
20
21
16
12
21
16
21
21
16
16
15
15
16
16
21
21
16
21
21
14