17
21
13
15
21
21
21
21
21
21
21
17
12
15
21
21
12
21
16
16
17
21
19
15
15
16
14
14
15
15
21
15
21
21
16
21
21
21
16
21
17
21
21
12
21
20
18
16
21
21
21
21
21
17
21
21
21
15
21
21
21
21
15
21
12
21
15
15
12
21
12
21
12
15
16
16
16
16
16
16
16
16
21
21
20
21
20
16
21
18
21
15
21
16
15
15
21
21
21
10