20
15
21
21
15
21
15
20
21
16
19
21
21
15
21
21
21
15
16
17
20
11
21
21
20
21
21
21
17
16
21
21
21
21
21
12
21
21
12
12
9
16
9
15
20
20
12
19
19
12
8
21
21
9
10
8
21
21
20
21
16
21
21
21
21
20
21
21
21
21
11
21
21
16
21
21
21
21
21
21
21
21
21
17
21
21
21
21
21
21
20
21
20
21
21
20
21
21
21
21