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277, 577, 677, 727, 757, 773, 787, 797, 877, 977, 1777, 2777, 7177, 7477, 7577, 7717, 7727, 7757, 7877, 47777, 67777, 71777, 76777, 77377, 77477, 77747, 77773, 77797, 77977, 79777, 97777, 727777, 773777, 775777, 777277, 777677, 777737, 777787
(list; graph; refs; listen; history; internal format)
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