20
21
21
21
12
17
21
21
21
21
21
21
15
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21
21
21
15
16
21
21
16
21
21
21
16
20
21
16
21
21
12
21
21
21
21
16
21
21
17
16
21
16
21
21
16
21
21
9
21
16
21
21
21
21
17
15
18
21
21
21
21
21
21
15
15
21
21
21
12
16
16
16
16
21
16
14
15
21
21
11
12
16
21
20
20
21
19
17
18
21
14
20
10
21
18
16
9
18