First numbers that belong to both sets:
66,
88,
666,
888,
1100,
1122,
1144,
1188,
2200,
2244,
2288,
3300,
3344,
3366,
3388,
4400,
4422,
4488,
5500,
5544,
6600,
6666,
6688,
7700,
7722,
7744,
7788,
8800,
8844,
8888,
9900,
9944,
11000,
11100,
22000,
22200,
22288,
33000,
33222,
33300,
44000,
44400,
55000,
55500,
55566,
66000,
66222,
66444,
66600,
77000,
77700,
88000,
88800,
88844,
99000,
99666,
99900,
99944,
110000,
110088,
111000,
111100,
111144,
111188,
111222,
111888,
112200,
112266,
112288,
113300,
113322,
113344,
114400,
114444,
115500,
115544,
115566,
116600,
116622,
116688,
117700,
117744,
118800,
118888,
119900,
119922,
119944,
119988,
220000,
220088,
221100,
221144,
222000,
222200,
222222,
222288,
222444,
222888,
223300,
223344,
224400,
224466,
225500,
225522,
225544,
226600,
226644,
226688,
227700,
227744,
227766,
228800,
228888,
229900,
229944,
330000,
330088,
331100,
331122,
331144,
331188,
332200,
332244,
332288,
333000,
333300,
333666,
333888,
334400,
334422,
334488,
335500,
335544,
336600,
337700,
337722,
337744,
337788,
338800,
338844,
339900,
339966,
440000,
440022,
441100,
441144,
442200,
442288,
443300,
443344,
444000,
444222,
444400,
444444,
444888,
445500,
445544,
445566,
446600,
446622,
446688,
447700,
447744,
448800,
449900,
449922,
449988,
550000,
550044,
550088,
551100,
552200,
552244,
552288,
553300,
553344,
554400,
554466,
555000,
555444,
555500,
555522,
555544,
555588,
555888,
556600,
557700,
557766,
558800,
558888,
559900,
559944,
660000,
660066,
660088,
661100,
661122,
661144,
662200,
662244,
662288,
663300,
663366,
664400,
664488,
665500,
666000,
666444,
666600,
666666,
666688,
666888,
667700,
667722,
667744,
668800,
668844,
668888,
669900,
669944,
770000,
771100,
771144,
772200,
772288,
773300,
773344,
773388,
774400,
774488,
775500,
775544,
776600,
776622,
776688,
777000,
777222,
777444,
777700,
777744,
777888,
778800,
778888,
779900,
779922,
779988,
880000,
880044,
880088,
881100,
881144,
881166,
882200,
882288,
883300,
883344,
884400,
884488,
885500,
885544,
886600,
886688,
887700,
887744,
888000,
888444,
888800,
888822,
888888,
889900,
990000,
991100,
992200,
993300,
993344,
993366,
994400,
994422,
995500,
995544.
Some larger examples :
9966222,
9966600,
9966888,
9977000,
9977700,
9988000,
9988800,
9988866,
9990000,
9991100,
9991188,
9992200,
9993344,
9994400,
9994488,
9995544,
9996688,
9998800,
9999000,
9999900.