def simplify(words):
        """Remove non-alphabetic characters from an array of words."""
        letter = lambda s: ''.join(filter(lambda s: 'a' <= s <= 'z', s))
        return tuple(filter(bool, map(letter, map(str.lower, words))))
Remove non-alphabetic characters from an array of words.
recipes/Python/577053_Bible_Verse_Quiz__comparepy/recipe-577053.py