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1
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1
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6
x  0
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4
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1
x  6
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9
x  0
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1
x  1
9
1
x  5
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4
x  1
11
2
x  0
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3
x  1
13
5
x  0
14
7
x  1
15
0
x  7
16
8
x  1
17
1
x  9
18
8
x  0

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