15 lines
141 B
Text
15 lines
141 B
Text
14
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1 1
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2 3
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4 6
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15 16
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17 19
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199 201
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899 999
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1990 2001
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6309 6409
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12345 12501
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19987 20093
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746814 747932
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900990999 900991010
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999999999 999999999
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