First numbers that belong to both sets:
1919,
2828,
3737,
4646,
6464,
7373,
8282,
9191,
191919,
282828,
373737,
464646,
646464,
737373,
828282,
919191,
19191919,
28282828,
37373737,
46464646,
64646464,
73737373,
82828282,
91919191,
1919191919,
2828282828,
3737373737,
4646464646,
6464646464,
7373737373,
8282828282,
9191919191,
191919191919,
282828282828,
373737373737,
464646464646,
646464646464,
737373737373,
828282828282,
919191919191,
19191919191919,
28282828282828,
37373737373737,
46464646464646,
64646464646464,
73737373737373,
82828282828282,
91919191919191.