First numbers that belong to both sets:
33,
44,
77,
88,
333,
444,
777,
888,
1100,
1133,
1144,
1177,
1188,
2200,
2233,
2244,
2277,
2288,
3300,
3333,
3344,
3377,
3388,
4400,
4433,
4444,
4477,
4488,
5500,
5533,
5544,
5577,
5588,
6600,
6633,
6644,
6677,
6688,
7700,
7733,
7744,
7777,
7788,
8800,
8833,
8844,
8877,
8888,
9900,
9933,
9944,
9977,
9988,
11000,
11100,
11133,
11144,
11177,
11188,
11333,
11444,
11777,
11888,
22000,
22200,
22233,
22244,
22277,
22288,
22333,
22444,
22777,
22888,
33000,
33300,
33333,
33344,
33377,
33388,
33444,
33777,
33888,
44000,
44333,
44400,
44433,
44444,
44477,
44488,
44777,
44888,
55000,
55333,
55444,
55500,
55533,
55544,
55577,
55588,
55777,
55888,
66000,
66333,
66444,
66600,
66633,
66644,
66677,
66688,
66777,
66888,
77000,
77333,
77444,
77700,
77733,
77744,
77777,
77788,
77888,
88000,
88333,
88444,
88777,
88800,
88833,
88844,
88877,
88888,
99000,
99333,
99444,
99777,
99888,
99900,
99933,
99944,
99977,
99988,
110000,
110033,
110044,
110077,
110088,
111000,
111100,
111133,
111144,
111177,
111188,
111333,
111444,
111777,
111888,
112200,
112233,
112244,
112277,
112288,
113300,
113333,
113344,
113377,
113388,
114400,
114433,
114444,
114477,
114488,
115500,
115533,
115544,
115577,
115588,
116600,
116633,
116644,
116677,
116688,
117700,
117733,
117744,
117777,
117788,
118800,
118833,
118844,
118877,
118888,
119900,
119933,
119944,
119977,
119988,
220000,
220033,
220044,
220077,
220088,
221100,
221133,
221144,
221177,
221188,
222000,
222200,
222233,
222244,
222277,
222288,
222333,
222444,
222777,
222888,
223300,
223333,
223344,
223377,
223388,
224400,
224433,
224444,
224477,
224488,
225500,
225533,
225544,
225577,
225588,
226600,
226633,
226644,
226677,
226688,
227700,
227733,
227744,
227777,
227788,
228800,
228833,
228844,
228877,
228888,
229900,
229933,
229944,
229977,
229988,
330000,
330033,
330044,
330077,
330088,
331100,
331133,
331144,
331177,
331188,
332200,
332233,
332244,
332277,
332288,
333000,
333300,
333333,
333344,
333377,
333388,
333444,
333777,
333888,
334400,
334433,
334444,
334477,
334488,
335500,
335533.
Some larger examples :
999997700,
999997733,
999997744,
999997777,
999997788,
999998800,
999998833,
999998844,
999998877,
999998888,
999999000,
999999333,
999999444,
999999777,
999999888,
999999900,
999999933,
999999944,
999999977,
999999988.