17
21
15
21
21
21
21
21
20
21
15
12
21
21
21
21
21
21
21
21
21
16
21
21
21
16
15
12
15
15
16
16
21
21
20
16
20
20
17
21
16
21
20
21
21
18
21
12
17
12
16
11
16
20
17
17
17
18
17
21
20
21
16
16
21
21
21
18
21
16
15
20
16
21
21
21
21
21
15
21
17
21
21
21
21
21
21
17
20
21
21
21
17
17
21
16
10
21
21
21