20
21
21
20
21
21
20
21
21
15
17
21
21
16
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
16
20
21
16
16
19
20
21
21
21
20
21
21
20
21
20
21
21
20
21
20
20
21
19
21
20
16
20
19
19
20
17
20
21
15
11
15
21
21
12
21
21
19
21
21
21
21
8
21
14
20
21
21
21
21
15
8
15
11
21
17
16
16
8
9
16
17
10
21