Advent of Code: Day 4
--- Part Two ---
An Elf just remembered one more important detail: the two adjacent matching digits are not part of a larger group of matching digits.
Given this additional criterion, but still ignoring the range rule, the following are now true:
- 112233 meets these criteria because the digits never decrease and all repeated digits are exactly two digits long.
- 123444 no longer meets the criteria (the repeated 44 is part of a larger group of 444).
- 111122 meets the criteria (even though 1 is repeated more than twice, it still contains a double 22).
How many different passwords within the range given in your puzzle input meet these criteria?
Your puzzle input is 246515-739105.
Your puzzle answer via the Python solution was 677.