21
21
21
16
21
21
21
21
21
18
21
21
21
18
21
21
21
16
21
21
20
16
21
21
21
21
21
20
21
21
21
21
16
18
21
20
16
21
21
17
16
21
21
15
21
21
21
18
21
21
16
21
15
16
20
16
17
16
21
18
21
15
21
21
21
21
21
20
19
21
21
21
20
21
16
15
21
21
21
21
18
21
21
21
20
21
19
17
16
21
18
19
16
21
21
16
21
21
18
16