20
16
16
21
21
21
21
21
21
21
8
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21
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11
21
20
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21
21
21
21
21
21
21
21
20
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21
21
17
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18
21
21
21
21
21
21
21
17
21
20
18
16
17
20
15
15
21
21
21
21
21
15
13
16
21
20
20
21
15
21
20
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21
21
21
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21
21
21
20
21
21
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21
21
20
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20
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16
21