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1
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9
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x  1
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0
x  5
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0
x  6
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1
x  0
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1
x  5
8
1
x  6
9
3
x  0
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1
x  9
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0
x  2
12
1
x  2
13
8
x  1
14
4
x  0
15
1
x  1
16
1
x  7
17
8
x  0
18
0
x  7

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