21
20
21
21
20
21
21
21
20
20
21
21
21
20
21
21
21
16
20
21
16
21
21
21
21
16
16
20
15
20
21
20
21
21
20
16
21
16
20
21
21
21
19
21
21
21
20
21
20
21
19
21
20
21
21
21
20
16
21
18
16
20
20
19
20
21
20
21
16
21
20
20
21
21
20
21
21
20
21
21
16
21
20
21
21
21
21
19
21
19
21
20
21
21
16
20
21
21
20
16
21
21
21
21
20
21
20
21
21
16
20
20
16
21
16
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
20
21
20
21
21
21
16
21
21
21
16
21
21
21
21
21
21
21
21
21
21
16
21
21
21
21
20
21
21
21
16
21
21
21
16
21
20
21
21
21
21
20
19
21
16
21
20
21
21
21
21
21
21
21
21
21
21
21
16
21
21
21
21
20
16