First numbers that belong to both sets:
11,
22,
33,
44,
55,
66,
77,
88,
99,
111,
222,
333,
444,
555,
666,
777,
888,
999,
1111,
1122,
1133,
1144,
1155,
1166,
1177,
1188,
1199,
2222,
2233,
2244,
2255,
2266,
2277,
2288,
2299,
3333,
3344,
3355,
3366,
3377,
3388,
3399,
4444,
4455,
4466,
4477,
4488,
4499,
5555,
5566,
5577,
5588,
5599,
6666,
6677,
6688,
6699,
7777,
7788,
7799,
8888,
8899,
9999,
11111,
11122,
11133,
11144,
11155,
11166,
11177,
11188,
11199,
11222,
11333,
11444,
11555,
11666,
11777,
11888,
11999,
22222,
22233,
22244,
22255,
22266,
22277,
22288,
22299,
22333,
22444,
22555,
22666,
22777,
22888,
22999,
33333,
33344,
33355,
33366,
33377,
33388,
33399,
33444,
33555,
33666,
33777,
33888,
33999,
44444,
44455,
44466,
44477,
44488,
44499,
44555,
44666,
44777,
44888,
44999,
55555,
55566,
55577,
55588,
55599,
55666,
55777,
55888,
55999,
66666,
66677,
66688,
66699,
66777,
66888,
66999,
77777,
77788,
77799,
77888,
77999,
88888,
88899,
88999,
99999,
111111,
111122,
111133,
111144,
111155,
111166,
111177,
111188,
111199,
111222,
111333,
111444,
111555,
111666,
111777,
111888,
111999,
112222,
112233,
112244,
112255,
112266,
112277,
112288,
112299,
113333,
113344,
113355,
113366,
113377,
113388,
113399,
114444,
114455,
114466,
114477,
114488,
114499,
115555,
115566,
115577,
115588,
115599,
116666,
116677,
116688,
116699,
117777,
117788,
117799,
118888,
118899,
119999,
222222,
222233,
222244,
222255,
222266,
222277,
222288,
222299,
222333,
222444,
222555,
222666,
222777,
222888,
222999,
223333,
223344,
223355,
223366,
223377,
223388,
223399,
224444,
224455,
224466,
224477,
224488,
224499,
225555,
225566,
225577,
225588,
225599,
226666,
226677,
226688,
226699,
227777,
227788,
227799,
228888,
228899,
229999,
333333,
333344,
333355,
333366,
333377,
333388,
333399,
333444,
333555,
333666,
333777,
333888,
333999,
334444,
334455,
334466,
334477,
334488,
334499,
335555,
335566,
335577,
335588,
335599,
336666,
336677,
336688,
336699,
337777,
337788,
337799,
338888,
338899,
339999,
444444,
444455,
444466,
444477,
444488,
444499.
Some larger examples :
778888889999999,
778888899999999,
778888999999999,
778889999999999,
778899999999999,
779999999999999,
888888888888888,
888888888888899,
888888888888999,
888888888889999,
888888888899999,
888888888999999,
888888889999999,
888888899999999,
888888999999999,
888889999999999,
888899999999999,
888999999999999,
889999999999999,
999999999999999.