First numbers that belong to both sets:
5,
64,
73,
82,
91,
654,
753,
852,
951,
7643,
8642,
8732,
9641,
9731,
9821,
76543,
86542,
87532,
96541,
97531,
98521,
876432,
976431,
986421,
987321,
8765432,
9765431,
9865421,
9875321,
98764321,
987654321.