16
8
18
18
18
20
9
9
15
17
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
16
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
16
21
21
21
21
21
12
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
15
21
21
21
21
21
21
15
21
21
21
11
21
9