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