16
20
9
16
16
21
21
21
16
16
21
16
21
20
16
16
20
20
16
21
21
16
21
17
16
21
21
21
16
21
20
20
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
16
21
21
21
21
16
21
21
21
21
16
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21
21
16
21
16
16
21
21
21
21
21
21
16
20
21
21
21
21
21
21
16
21
21
16
21
21
21
21
21
21
18
21
16
14
21
21
20
21
21
21