21
15
16
16
21
16
21
16
21
16
16
15
16
21
20
16
21
21
16
21
21
21
15
21
17
17
16
21
21
21
12
21
21
16
17
16
21
15
21
21
21
21
21
21
21
21
16
16
21
21
18
18
16
18
21
16
18
21
21
12
21
17
13
21
21
21
21
21
21
21
21
21
21
21
21
16
21
21
21
21
21
21
21
17
21
15
14
21
16
21
16
12
17
16
18
16
10
9
14
8