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