First numbers that belong to both sets:
66,
88,
222,
444,
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,
9966,
11000,
11100,
11144,
11166,
22000,
22200,
22266,
22288,
33000,
33222,
33300,
33366,
33444,
33666,
33888,
44000,
44400,
44466,
55000,
55500,
55566,
55888,
66000,
66222,
66444,
66600,
66666,
66888,
77000,
77700,
77744,
77766,
88000,
88800,
88844,
88866,
99000,
99222,
99444,
99666,
99888,
99900,
99944,
99966,
99988,
110000,
110022,
110088,
111000,
111100,
111144,
111188,
111222,
111444,
111666,
111888,
112200,
112266,
112288,
113300,
113322,
113344,
113388,
114400,
114444,
114488,
115500,
115544,
115566,
116600,
116622,
116655,
116688,
117700,
117744,
118800,
118866,
118888,
119900,
119922,
119944,
119966,
119988,
220000,
220044,
220088,
221100,
221144,
221166,
222000,
222200,
222222,
222288,
222444,
222666,
222888,
223300,
223344,
224400,
224466,
224488,
225500,
225522,
225544,
225588,
226600,
226644,
226688,
227700,
227744,
227766,
228800,
228822,
228844,
228888,
229900,
229944,
330000,
330044,
330066,
330088,
331100,
331122,
331144,
331188,
332200,
332244,
332288,
333000,
333222,
333300,
333344,
333366,
333444,
333666,
333888,
334400,
334422,
334488,
335500,
335544,
336600,
336644,
336666,
336688,
337700,
337722,
337744,
337788,
338800,
338844,
338888,
339900,
339944,
339966,
440000,
440022,
440055,
440088,
441100,
441144,
442200,
442244,
442266,
442288,
443300,
443322,
443344,
443388,
444000,
444222,
444400,
444444,
444488,
444666,
444888,
445500,
445544,
445566,
445588,
446600,
446622,
446688,
447700,
447744,
448800,
448866,
448888,
449900,
449922,
449944,
449988,
550000,
550044,
550088,
551100,
551144,
551166,
552200,
552222,
552244,
552288,
553300,
553344,
554400,
554466,
554488,
555000,
555222,
555444,
555500,
555522,
555544,
555555,
555588,
555666,
555888,
556600,
556644,
556688,
557700,
557744,
557766,
557788,
558800,
558822,
558844,
558888,
559900,
559944,
559988,
660000,
660044,
660066,
660088,
661100,
661122,
661144,
661188,
662200,
662244,
662288,
663300,
663344,
663366.
Some larger examples :
996600,
996666,
996688,
997700,
997722,
997744,
997766,
997788,
998800,
998844,
998888,
999000,
999222,
999444,
999666,
999888,
999900,
999944,
999966,
999999.