First numbers that belong to both sets:
21,
54,
65,
78,
89,
98,
210,
321,
345,
545,
765,
789,
989,
2121,
2321,
2345,
3210,
3234,
3434,
4545,
5454,
7898,
8789,
12101,
12345,
43434,
45654,
54321,
56565,
65678,
67878,
78789,
87654,
87878,
101010,
123234,
212121,
234345,
323210,
323454,
345434,
345654,
432101,
432345,
434345,
434565,
454545,
456789,
543234,
545454,
654345,
656789,
676545,
765434,
765678,
787878,
876789,
878765,
1010121,
1212345,
2121210,
2123234,
3232101,
3234345,
3234545,
3432345,
3456765,
4343210,
4567878,
5432345,
5434545,
5456765,
5656545,
5676789,
5678789,
7654565,
7656789,
7676765,
7878765,
7878989,
8767898,
8987678,
9876545,
9876789,
10121010,
10123454,
12121010,
12323210,
12323234,
12345678,
21212121,
23212121,
23232101,
23234345,
32121234,
32123210,
32321234,
32345654,
32345678,
34323234,
34343234,
34343454,
34545678,
34565454,
34565678,
43212345,
43232321,
43232345,
43234545,
43432121,
43454345,
45432345,
45434321,
45434345,
45456545,
45654345,
45656765,
45676565,
45678789,
54343434,
54345678,
54543210,
56765678,
56767878,
56787878,
65432121,
65434545,
65456565,
65456789,
65654321,
65654565,
67654545,
67654565,
67656789,
76545434,
76565454,
76565678,
76765434,
76767678,
76789878,
78767654,
78987678,
78989898,
87656765,
87676565,
87678765,
87678789,
87878789,
98767878,
98767898,
98989898,
101232321,
101234565,
123212321,
123232101,
123432321,
123434565.