21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
16
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
16
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
20
21
16
21
21
21
21
20
21
21
21
20
21
16
21
21
21
21
20
20
21
21
21
21
21
21
21
21
21
21
20
21
20
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
19
21
20