def pig_latin(stemmed_word: tuple):
    """Return the pig latin string of the given tuple.
       Ex: (a, pple) -> appleyay / (cat) -> atcay"""

    start, end = stemmed_word
    if start.startswith(('a', 'e', 'i', 'o', 'u')):
        return start + end + 'yay'
    else:
        return end + start + 'ay'