First numbers that belong to both sets:
1,
2,
3,
4,
7,
10,
11,
20,
21,
22,
40,
41,
42,
43,
44,
70,
71,
72,
73,
74,
77,
100,
110,
111,
200,
210,
211,
220,
221,
222,
300,
310,
311,
320,
321,
322,
400,
410,
411,
420,
421,
422,
440,
441,
442,
443,
444,
700,
710,
711,
720,
721,
722,
740,
741,
742,
743,
744,
770,
771,
772,
773,
774,
777,
1000,
1100,
1110,
1111,
2000,
2100,
2110,
2111,
2200,
2210,
2211,
2220,
2221,
2222,
3000,
3100,
3110,
3111,
3200,
3210,
3211,
3220,
3221,
3222,
3300,
3310,
3311,
3320,
3321,
3322,
4000,
4100,
4110,
4111,
4200,
4210,
4211,
4220,
4221,
4222,
4300,
4310,
4311,
4320,
4321,
4322,
4400,
4410,
4411,
4420,
4421,
4422,
4440,
4441,
4442,
4443,
4444,
7000,
7100,
7110,
7111,
7200,
7210,
7211,
7220,
7221,
7222,
7300,
7310,
7311,
7320,
7321,
7322,
7400,
7410,
7411,
7420,
7421,
7422,
7440,
7441,
7442,
7443,
7444,
7700,
7710,
7711,
7720,
7721,
7722,
7740,
7741,
7742,
7743,
7744,
7770,
7771,
7772,
7773,
7774,
7777,
10000,
11000,
11100,
11110,
11111,
20000,
21000,
21100,
21110,
21111,
22000,
22100,
22110,
22111,
22200,
22210,
22211,
22220,
22221,
22222,
40000,
41000,
41100,
41110,
41111,
42000,
42100,
42110,
42111,
42200,
42210,
42211,
42220,
42221,
42222,
43000,
43100,
43110,
43111,
43200,
43210,
43211,
43220,
43221,
43222,
43300,
43310,
43311,
43320,
43321,
43322,
44000,
44100,
44110,
44111,
44200,
44210,
44211,
44220,
44221,
44222,
44300,
44310,
44311,
44320,
44321,
44322,
44400,
44410,
44411,
44420,
44421,
44422,
44440,
44441,
44442,
44443,
44444,
70000,
71000,
71100,
71110,
71111,
72000,
72100,
72110,
72111,
72200,
72210,
72211,
72220,
72221,
72222,
73000,
73100,
73110,
73111,
73200,
73210,
73211,
73220,
73221,
73222,
73300,
73310,
73311,
73320,
73321,
73322,
74000,
74100,
74110,
74111,
74200,
74210.
Some larger examples :
777442,
777443,
777444,
777700,
777710,
777711,
777720,
777721,
777722,
777740,
777741,
777742,
777743,
777744,
777770,
777771,
777772,
777773,
777774,
777777.