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