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