21
21
16
15
21
21
21
21
15
21
14
17
21
19
21
21
21
21
21
21
16
21
21
21
21
15
16
21
21
21
21
20
21
18
18
21
20
21
21
21
21
21
18
20
15
21
21
21
20
18
18
21
21
16
15
21
21
21
12
18
18
20
18
18
18
16
21
21
21
20
18
21
21
21
21
16
18
16
21
16
21
21
21
21
21
21
15
21
21
21
21
18
21
21
9
21
11
17
15
19