20
21
21
21
20
21
21
20
21
21
20
18
21
21
18
21
21
21
20
21
21
21
20
21
21
21
21
19
20
21
21
18
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
21
21
21
21
21
21
21
21
16
16
15
16
15
19
18
16
21
20
18
16
16
21
17
16
21
21
15
21
16
16
8
15
20
11