ChatGPT and passed all tests:

import re

regex_integer_in_range = r"^[1-9][0-9]{5}$" regex_alternating_repetitive_digit_pair = r"(\d)(?=\d\1)"

P = input()

print(bool(re.match(regex_integer_in_range, P)) and len(re.findall(regex_alternating_repetitive_digit_pair, P)) < 2)