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1
8
x  1
2
0
x  4
3
2
x  0
4
1
x  1
5
0
x  3
6
1
x  6
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9
x  1
8
0
x  7
9
1
x  2
10
7
x  1
11
1
x  5
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8
x  0
13
5
x  0
14
1
x  4
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0
x  1
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0
x  6
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0
x  9
18
3
x  1
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