20 lines
90 B
Text
20 lines
90 B
Text
6
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2 1 1
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1 2
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4 1 2
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1 2
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2 4
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7 2 3
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1 2
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1 3
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6 7
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5 1 2
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1 2
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3 5
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9 2 1
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2 8
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9 2 4
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7 9
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4 8
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1 3
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2 3
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