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junction n.  and  upside-down n.

First numbers that belong to both sets:

3827, 4826, 5825, 6824, 7823, 8822, 9821, 19519, 29518, 39517, 67534, 77533, 87532, 97531, 181929, 182829, 183729, 184629, 185529, 186429, 187329, 188229, 189129, 281928, 282828, 283728, 284628, 285528, 286428, 287328, 288228, 289128, 381927, 382827, 383727, 384627, 385527, 386427, 387327, 388227, 389127, 481926, 482826, 483726, 484626, 485526, 486426, 487326, 488226, 489126, 581925, 582825, 583725, 584625, 585525, 586425, 587325, 588225, 589125, 681924, 682824, 683724, 684624, 685524, 686424, 687324, 688224, 689124, 961941, 962841, 963741, 964641, 965541, 966441, 967341, 968241, 969141, 1715939, 1725839, 1735739, 1745639, 1755539, 1765439, 1775339, 1785239, 1795139, 2715938, 2725838, 2735738, 2745638, 2755538, 2765438, 2775338, 2785238, 2795138, 3715937, 3725837, 3735737, 3745637, 3755537, 3765437, 3775337, 3785237, 3795137, 4715936, 4725836, 4735736, 4745636, 4755536, 4765436, 4775336, 4785236, 4795136, 5715935, 5725835, 5735735, 5745635, 5755535, 5765435, 5775335, 5785235, 5795135, 6715934, 6725834, 6735734, 6745634, 6755534, 6765434, 6775334, 6785234, 6795134, 7715933, 7725833, 7735733, 7745633, 7755533, 7765433, 7775333, 7785233, 7795133, 8715932, 8725832, 8735732, 8745632, 8755532, 8765432, 8775332, 8785232, 8795132, 9715931, 9725831, 9735731, 9745631, 9755531, 9765431, 9775331, 9785231, 9795131, 18119929, 18128929, 18137929, 18146929, 18155929, 18164929, 18173929, 18182929, 18191929, 18219829, 18228829, 18237829, 18246829, 18255829, 18264829, 18273829, 18282829, 18291829, 18319729, 18328729, 18337729, 18346729, 18355729, 18364729, 18373729, 18382729, 18391729, 18419629, 18428629, 18437629, 18446629, 18455629, 18464629, 18473629, 18482629, 18491629, 18519529, 18528529, 18537529, 18546529, 18555529, 18564529, 18573529, 18582529, 18591529, 18619429, 18628429, 18637429, 18646429, 18655429, 18664429, 18673429, 18682429, 18691429, 18719329, 18728329, 18737329, 18746329, 18755329, 18764329, 18773329, 18782329, 18791329, 18819229, 18828229, 18837229, 18846229, 18855229, 18864229, 18873229, 18882229, 18891229, 18919129, 18928129, 18937129, 18946129, 18955129, 18964129, 18973129, 18982129, 18991129, 46119946, 46128946, 46137946, 46146946, 46155946, 46164946, 46173946, 46182946, 46191946, 46219846, 46228846, 46237846, 46246846, 46255846, 46264846, 46273846, 46282846, 46291846, 46319746, 46328746, 46337746, 46346746, 46355746, 46364746, 46373746, 46382746, 46391746, 46419646, 46428646, 46437646, 46446646, 46455646, 46464646, 46473646, 46482646, 46491646, 46519546, 46528546, 46537546, 46546546, 46555546.

Some larger examples :