15
21
21
21
16
21
18
21
21
18
18
16
18
15
12
21
15
21
15
15
18
21
16
21
16
15
12
12
21
18
21
16
21
21
21
18
18
18
21
16
21
21
16
16
21
16
21
21
21
21
21
16
21
21
21
12
21
21
21
21
21
21
21
18
21
21
21
18
21
18
12
21
17
21
16
21
21
18
18
18
21
21
16
21
12
21
21
21
21
21
21
16
21
21
21
15
18
16
16
9