21
12
16
15
16
15
21
21
21
20
15
15
16
16
21
21
20
21
12
21
16
13
21
17
15
21
18
21
21
21
13
21
21
21
15
18
21
21
21
15
15
21
21
21
21
15
15
21
18
18
17
11
21
21
21
16
21
21
21
21
17
21
21
21
21
21
21
15
16
21
21
21
21
21
21
21
16
18
12
21
16
20
21
12
21
15
21
21
20
12
12
15
19
21
21
16
12
12
21
21