First numbers that belong to both sets:
4,
6,
8,
9,
22,
33,
44,
55,
66,
77,
88,
99,
171,
202,
212,
222,
232,
242,
252,
262,
272,
282,
292,
303,
323,
333,
363,
393,
404,
414,
424,
434,
444,
454,
464,
474,
484,
494,
505,
515,
525,
535,
545,
555,
565,
575,
585,
595,
606,
616,
626,
636,
646,
656,
666,
676,
696,
707,
717,
737,
747,
767,
777,
808,
818,
828,
838,
848,
858,
868,
878,
888,
898,
909,
939,
949,
959,
969,
979,
989,
999,
1001,
1111,
1221,
1441,
1551,
1661,
1771,
1881,
1991,
2002,
2112,
2222,
2332,
2442,
2552,
2772,
2882,
2992,
3003,
3113,
3223,
3333,
3443,
3553,
3663,
3883,
4004,
4114,
4224,
4334,
4444,
4554,
4664,
4774,
4884,
4994,
5005,
5115,
5225,
5335,
5445,
5555,
5665,
5775,
5885,
5995,
6006,
6116,
6226,
6336,
6446,
6556,
6666,
6776,
6886,
6996,
7007,
7117,
7227,
7337,
7447,
7557,
7667,
7777,
7887,
7997,
8008,
8118,
8228,
8338,
8448,
8558,
8668,
8778,
8888,
8998,
9009,
9119,
9229,
9339,
9449,
9559,
9669,
9779,
9889,
9999,
10101,
10701,
11011,
11211,
11511,
11811,
12121,
12221,
13131,
13231,
13431,
13731,
14241,
14541,
14841,
15051,
15151,
15251,
15351,
15651,
15851,
15951,
16261,
16461,
16761,
16861,
17171,
17271,
17771,
17871,
18081,
18281,
18381,
18581,
18681,
18981,
19091,
19291,
19591,
20002,
20102,
20202,
20302,
20502,
20602,
20702,
20802,
20902,
21012,
21112,
21212,
21312,
21412,
21512,
21612,
21712,
21812,
21912,
22022,
22122,
22222,
22322,
22422,
22522,
22622,
22722,
22822,
22922,
23032,
23132,
23232,
23332,
23432,
23532,
23632,
23732,
23832,
23932,
24042,
24142,
24242,
24342,
24442,
24542,
24642,
24742,
24842,
24942,
25052,
25152,
25252,
25352,
25452,
25552,
25652,
25752,
25852,
26062,
26162,
26262,
26362,
26462,
26562,
26662,
26762,
26862,
26962,
27072,
27172,
27272,
27372,
27472,
27572.
Some larger examples :
9976799,
9977799,
9979799,
9982899,
9983899,
9984899,
9985899,
9986899,
9987899,
9988899,
9990999,
9991999,
9992999,
9993999,
9994999,
9995999,
9996999,
9997999,
9998999,
9999999.