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