21
17
20
17
18
21
21
16
17
20
21
16
21
16
12
16
15
21
21
21
21
20
21
21
16
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
16
21
21
21
21
21
17
21
21
21
19
21
16
21
21
21
21
21
21
21
21
21
21
21
20
21
16
17
21
21
21
20
21
18
21
16
21
21
21
21
21
21
21
20
21
21
21
12
17
15
21
16
21
21