First numbers that belong to both sets:
1,
9,
45,
999,
2223,
4950,
5050,
5292,
7272,
142857,
148149,
187110,
356643,
466830,
499500,
500500,
538461,
627615,
648648,
681318,
791505,
818181,
961038,
994708,
5555556,
11111112,
16590564,
30884184,
36363636,
49995000,
50005000,
55474452,
74747475,
234567901,
432432432,
665188470,
999999999,
2020202020,
3846956652,
4132841328,
4999950000,
5000050000,
8888888889.