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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _move_consonant(self, letters: list, positions: List[int]) -> List[str]: """ Given a list of consonant positions, move the consonants according to certain consonant syllable behavioral rules for gathering and grouping. :param letters: :param positions: :return: """

        for pos in positions:
            previous_letter = letters[pos - 1]
            consonant = letters[pos]
            next_letter = letters[pos + 1]
            if self._contains_vowels(next_letter) and self._starts_with_vowel(next_letter):
                return string_utils.move_consonant_right(letters, [pos])
            if self._contains_vowels(previous_letter) and self._ends_with_vowel(
                    previous_letter) and len(previous_letter) == 1:
                return string_utils.move_consonant_left(letters, [pos])
            if previous_letter + consonant in self.constants.ASPIRATES:
                return string_utils.move_consonant_left(letters, [pos])
            if consonant + next_letter in self.constants.ASPIRATES:
                return string_utils.move_consonant_right(letters, [pos])
            if next_letter[0] == consonant:
                return string_utils.move_consonant_left(letters, [pos])
            if consonant in self.constants.MUTES and next_letter[0] in self.constants.LIQUIDS:
                return string_utils.move_consonant_right(letters, [pos])
            if consonant in ['k', 'K'] and next_letter[0] in ['w', 'W']:
                return string_utils.move_consonant_right(letters, [pos])
            if self._contains_consonants(next_letter[0]) and self._starts_with_vowel(
                    previous_letter[-1]):
                return string_utils.move_consonant_left(letters, [pos])
            # fall through case
            if self._contains_consonants(next_letter[0]):
                return string_utils.move_consonant_right(letters, [pos])
        return letters