Create a function that returns True if each pair of adjacent numbers in a list shares at least one digit and False otherwise.
shared_digits([33, 53, 6351, 12, 2242, 44]) ➞ True
# 33 and 53 share 3, 53 and 6351 share 3 and 5, etc.
shared_digits([1, 11, 12, 13, 14, 15, 16]) ➞ True
shared_digits([33, 44, 55, 66, 77]) ➞ False
shared_digits([1, 12, 123, 1234, 1235, 6789]) ➞ False
N/A