20
21
21
21
21
21
21
21
21
21
21
20
16
16
21
21
15
21
21
21
21
14
17
21
16
21
21
21
17
21
21
21
19
17
17
17
21
21
21
21
21
21
15
21
21
21
21
20
21
17
12
17
18
21
21
20
20
21
21
21
21
21
15
21
21
21
20
21
17
21
21
21
21
21
16
21
16
21
16
21
18
14
21
14
18
21
21
12
16
21
21
21
15
16
21
16
20
21
16
16