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1
x  3
2
4
x  1
3
0
x  5
4
1
x  8
5
1
x  1
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0
x  9
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0
x  1
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x  1
9
8
x  0
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1
x  5
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6
x  0
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0
x  3
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1
x  9
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0
x  7
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0
x  4
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2
x  0
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7
x  1
18
2
x  1
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