20
21
21
21
21
19
10
21
21
21
21
21
21
21
21
16
21
21
21
21
21
21
20
21
21
21
21
21
21
16
21
16
21
20
21
20
21
9
21
21
21
21
9
21
21
12
21
21
20
21
16
21
21
19
21
21
21
21
17
21
21
21
21
21
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17
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15
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17
17
21
16
18
17
21
21
21
20
21
17
20
21
21
21
21
16
21
20
21
21
16
20
21
17
13
21
18