15
21
19
17
15
8
17
8
15
9
11
13
21
18
21
21
21
21
21
17
21
21
21
21
15
21
21
21
21
21
21
21
12
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
19
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
20
21
15
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
16
21