First numbers that belong to both sets:
44,
66,
44000,
66000,
44000000,
44000044,
44000066,
66000000,
66000044,
66000066,
44000000000,
44000000044,
44000000066,
44000044000,
44000066000,
66000000000,
66000000044,
66000000066,
66000044000,
66000066000,
44000000000000,
44000000000044,
44000000000066,
44000000044000,
44000000066000,
44000044000000,
44000044000044,
44000044000066,
44000066000000,
44000066000044,
44000066000066,
66000000000000,
66000000000044,
66000000000066,
66000000044000,
66000000066000,
66000044000000,
66000044000044,
66000044000066,
66000066000000,
66000066000044,
66000066000066.