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