Envío 2206

Código

""" 0x5c - Decir si hay una letra repetida """


def main(word=""):
    """ return 'yes' if the 'word' contains at least one repeated letter or
    'no' if the 'word' doesn't contain any repeated letter """
    if word == "":
        word = input()
    for letter in word:
        times = word.count(letter)
        if times > 1:
            return "yes"
    return "no"


if __name__ == "__main__":
    print(main("codeo"))
    print(main("murcielagos"))
else:
    main()