21
21
20
21
21
21
21
21
21
21
21
21
16
16
21
16
16
16
20
21
21
21
16
16
21
21
21
16
16
16
21
16
21
21
16
16
21
21
16
21
21
21
16
16
16
16
16
20
21
21
16
21
16
21
20
15
18
21
21
16
21
21
20
21
21
21
21
16
21
21
21
21
21
21
21
21
21
21
16
21
20
20
21
21
21
19
21
16
21
16
12
21
21
16
20
21
16
16
21
16
16
19
21
21
21
16
21
21
21
21
21
20
21
21
20
16
21
21
21
21
16
21
21
16
21
21
16
16
16
21
21
20
21
21
16
21
16
21
21
13
21
16
16
21
21
21
15
21
21
21
21
16
20
20
16
12
21
21
20
21
21
16
19
21
19
20
18
21
20
21
21
16
21
20
21
21
16
19
16
16
21
21
21
16
15
21
20
21
14
16
16
21
16
21
21
21
18
16
21