16
12
18
21
21
21
16
21
16
21
15
21
16
17
21
21
21
21
21
21
21
21
21
21
21
16
21
12
15
21
16
21
16
16
21
12
21
21
21
21
21
21
16
21
21
21
21
16
21
21
21
17
21
21
21
21
16
15
16
16
21
21
14
15
21
16
16
21
21
21
21
16
18
21
21
21
21
16
20
21
16
18
21
21
21
21
21
16
21
16
19
21
8
15
21
18
9
21
21