First numbers that belong to both sets:
10,
12,
21,
34,
56,
65,
67,
76,
87,
98,
121,
234,
321,
345,
434,
454,
545,
565,
654,
656,
678,
787,
789,
878,
1010,
1012,
1234,
2101,
2123,
2323,
2345,
3210,
3212,
3234,
3434,
4321,
4345,
4545,
4565,
5434,
5454,
5456,
5656,
5678,
6565,
7678,
7876,
8765,
8987,
8989,
9878,
9898,
10121,
12323,
12343,
21010,
21012,
21232,
23234,
23432,
23456,
32121,
32343,
34321,
34343,
34567,
43210,
43212,
43234,
43432,
45656,
54321,
54345,
54545,
56565,
56767,
56787,
56789,
65432,
65454,
65456,
65656,
65678,
67654,
67678,
67876,
67898,
76765,
76787,
76789,
78767,
87678,
101010,
101012,
121210,
121212,
123232,
123432,
212123,
212323,
212343,
232123,
232343,
234343,
321010,
321012,
321210,
321212,
323432,
432121,
432343,
434321,
434543,
454323,
454343,
454565,
456767,
456787,
456789,
543234,
543432,
543456,
545432,
545456,
565432,
565656,
567678,
567876,
654343,
654565,
656767,
676567,
676765,
676787,
676789,
678767,
765432,
765454,
765654,
765676,
767656,
767676,
767876,
767898,
787654,
787876,
876543,
876765,
876787,
876789,
878765,
878987,
878989,
898765,
898787,
898789,
987656,
987878,
989876,
989898,
1010101,
1010123,
1012101,
1012123,
1012321,
1012345,
1210101,
1210123,
1212121,
1212323,
1232101,
1232123,
1232323,
1232343,
1234323,
1234345,
1234543,
1234545,
1234567,
2101010,
2101012,
2121232,
2123454,
2123456,
2321010,
2321012,
2321234,
2323434,
2323456,
2343232,
2343432,
2343456,
2345432,
2345454,
2345456,
2345656,
2345676,
3210123,
3212323,
3232121,
3232343,
3234343,
3234567,
3432121,
3432321,
3432345,
3434321,
3434343,
3434543,
3454323,
3454345,
3454543,
3454545,
3454567,
3456545,
3456565,
3456767,
3456787,
3456789,
4321010,
4321012,
4321234,
4323232,
4323434,
4323454,
4343232,
4343432,
4343456,
4345454,
4345654,
4345678,
4543210,
4543212,
4543232,
4543434,
4543454,
4545432,
4545454,
4545456,
4545656,
4545678,
4565432,
4565654,
4565676,
4567654,
4567678,
4567878,
5432101,
5432123,
5432343,
5434321,
5434567,
5454321,
5454343,
5454565,
5456565,
5456765,
5456787,
5456789,
5654321,
5654345,
5656545,
5656767,
5656787,
5656789,
5676543,
5676567,
5678765,
5678987,
5678989,
6543232,
6543434,
6543454,
6545454,
6545654,
6545678,
6565434,
6565454,
6565654,
6565676.
Some larger examples :
7898789,
7898987,
7898989,
8765678,
8767676,
8767898,
8787676,
8787878,
8789878,
8789898,
8987654,
8987898,
8989878,
9876567,
9876765,
9876787,
9876789,
9898765,
9898787,
9898789.