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1
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1
x  4
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8
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0
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7
x  1
6
3
x  0
7
2
x  0
8
9
x  1
9
0
x  7
10
8
x  1
11
0
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12
3
x  1
13
1
x  0
14
5
x  0
15
1
x  6
16
5
x  1
17
0
x  9
18
1
x  1

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