First numbers that belong to both sets:
11,
33,
77,
1111,
1133,
1177,
1199,
3333,
3377,
4411,
4433,
4499,
5511,
5533,
5599,
6611,
6677,
7711,
7733,
7777,
7799,
8877,
8899,
9911,
9977,
11111,
11155,
11177,
11333,
11777,
22111,
22211,
22277,
22299,
22333,
22555,
22777,
22999,
33311,
33377,
33555,
44111,
44333,
44411,
44455,
44477,
44555,
44777,
44999,
55111,
55333,
55511,
55533,
55577,
55999,
66111,
66611,
66677,
66777,
66999,
77111,
77333,
77711,
77777,
77999,
88111,
88333,
88555,
88777,
88811,
88855,
88877,
88899,
88999,
99933,
99977,
110011,
110077,
110099,
111133,
112277,
113311,
113333,
114411,
114433,
114499,
115511,
115577,
116611,
116677,
117799,
118811,
118877,
119933,
119977,
119999,
220011,
220033,
221111,
221133,
221177,
222211,
222299,
223333,
224477,
224499,
225511,
225577,
225599,
226677,
226699,
227711,
227777,
228833,
228877,
228899,
229933,
330011,
330077,
331111,
331133,
331199,
332211,
332233,
332299,
333311,
333377,
333399,
334433,
334477,
334499,
335577,
335599,
336611,
336677,
337733,
337777,
337799,
338833,
338899,
339933,
339977,
440011,
440033,
440099,
441111,
441177,
441199,
442277,
443311,
443333,
443377,
443399,
444477,
445511,
445577,
446633,
446677,
446699,
447733,
447799,
448811,
448877,
449911,
449933,
449977,
550099,
551111,
551199,
552211,
552233,
552277,
553399,
554411,
554433,
555533,
555599,
556611,
556633,
556699,
557711,
557733,
557777,
558811,
558833,
559933,
559977,
661111,
661133,
661177,
661199,
662299,
663311,
663377,
664433,
664477,
664499,
665533,
665599,
666611,
666633,
666677,
667711,
667733,
668833,
669911,
770011,
770033,
770077,
770099,
771177,
771199,
772211,
772277,
773333,
773377,
773399,
774499,
775511,
775577,
776611,
776633,
776677,
777711,
778811,
778899,
779911,
779977,
880077,
880099,
881111,
881177,
882233,
882277,
882299,
883333,
883399,
884411,
884433,
884477,
885511,
886633,
886699,
887711,
887799,
888833,
888877,
888899,
889933,
889999,
990011,
990077,
991133,
991177,
991199,
992211,
992233,
993311,
994411,
994433,
994477,
995599,
996699,
997711,
997733,
997777,
997799,
998833,
998877,
999911,
999977,
1100033,
1100077,
1100111,
1100555,
1100777,
1100999,
1110011,
1110077,
1111111.
Some larger examples :
9994411,
9994433,
9994477,
9994499,
9995533,
9995599,
9996611,
9996677,
9997711,
9997733,
9997755,
9997777,
9997799,
9998833,
9998899,
9999777,
9999911,
9999933,
9999955,
9999977.