:param str word: word to check spelling
    :param str engine:
        * pn - Peter Norvig's algorithm (default)
    :return: list of words

def spell(word: str, engine: str = "pn") -> List[str]:
    """
    :param str word: word to check spelling
    :param str engine:
        * pn - Peter Norvig's algorithm (default)
    :return: list of words
    """

    return DEFAULT_SPELL_CHECKER.spell(word)