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