First numbers that belong to both sets:
20,
30,
40,
42,
54,
60,
66,
70,
72,
80,
84,
88,
90,
96,
100,
200,
210,
220,
222,
300,
320,
330,
400,
420,
432,
440,
444,
500,
510,
520,
522,
532,
540,
544,
550,
552,
600,
620,
630,
640,
642,
644,
650,
654,
660,
666,
700,
720,
732,
740,
744,
750,
760,
762,
770,
774,
800,
810,
820,
822,
832,
840,
852,
860,
864,
870,
876,
880,
882,
888,
900,
910,
920,
930,
940,
942,
952,
954,
960,
966,
972,
980,
984,
990,
992,
996,
1000,
1100,
1110,
2000,
2100,
2200,
2210,
2220,
3000,
3100,
3200,
3210,
3220,
3222,
3300,
3320,
3330,
3332,
4000,
4100,
4110,
4200,
4220,
4300,
4320,
4332,
4400,
4410,
4420,
4422,
4440,
5000,
5100,
5110,
5200,
5220,
5300,
5310,
5320,
5322,
5400,
5420,
5430,
5432,
5440,
5442,
5500,
5520,
5530,
5532,
5540,
5544,
5550,
6000,
6100,
6200,
6210,
6220,
6222,
6300,
6320,
6330,
6400,
6420,
6432,
6440,
6444,
6500,
6510,
6520,
6522,
6540,
6552,
6600,
6620,
6630,
6640,
6642,
6650,
6654,
6660,
6664,
6666,
7000,
7100,
7110,
7200,
7210,
7220,
7300,
7320,
7332,
7400,
7410,
7420,
7422,
7440,
7500,
7520,
7530,
7532,
7540,
7542,
7544,
7552,
7554,
7600,
7620,
7630,
7632,
7640,
7644,
7650,
7660,
7662,
7700,
7710,
7720,
7722,
7740,
7744,
7752,
7760,
7764,
7770,
7776,
8000,
8100,
8200,
8220,
8300,
8310,
8320,
8322,
8330,
8400,
8420,
8430,
8432,
8440,
8442,
8500,
8520,
8532,
8540,
8544,
8550,
8600,
8610,
8620,
8622,
8632,
8640,
8652,
8660,
8664,
8700,
8720,
8730,
8740,
8742,
8750,
8754,
8760,
8764,
8766,
8772,
8800,
8820,
8832,
8840,
8844,
8850,
8860,
8862,
8874,
8876,
8880,
8886,
8888,
9000,
9100,
9200,
9210,
9220,
9222,
9300,
9310,
9320,
9330,
9400,
9420,
9432,
9440.
Some larger examples :
44443210,
44443220,
44443300,
44443320,
44443332,
44444000,
44444100,
44444200,
44444220,
44444300,
44444310,
44444320,
44444322,
44444330,
44444400,
44444420,
44444430,
44444440,
44444442,
50000000.