21
21
21
21
21
21
16
21
21
16
21
16
21
21
21
21
21
21
21
21
21
21
20
21
21
20
21
21
21
21
21
21
21
16
21
21
20
21
21
21
21
20
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
21
16
21
21
21
21
21
21
21
21
21
20
16
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
20
21
21
21
21
21
21
20
21
21
16
21
21
21
16
21
16
21
21
21
21
21
21
21
21
16
21
21
16
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
16
21
21
21
21
20
19
20
20
17
19
16
21
20
16
21
20
21
21
21
21
21
19
19
20
20
21
21
21
21
21
20
21
21
21
16
21
21
21
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21