"""T04."""


def make_hola_string(count: int) -> str:
    """
    Make hola string.

    :param: number of holas
    :return:
    """
    return count * 'hola'


def alphabet_index(letters, letter: str):
    """
    Find index.

    :param letters: list, str
    :param letter: str
    :return: int
    """
    out = 'Letter not found.'
    for i, val in enumerate(letters):
        if val == letter:
            out = i
            break
    return out


def multiply_letter(letter: str, times: int) -> str:
    """
    Multiplying letters

    :param times: int
    :param letter: str
    :return: str
    """
    for x in letter:
        if letter == x:
            return x *times


def decrypt_cipher(ciphertext: str, key: int) -> str:
    """
     Decrypt and you shall find.

    :param ciphertext: str
    :param key: int
    :return:
    """
    return ''.join((ciphertext[i] for i in range(0, len(ciphertext),key)))


def find_mode(string: str) -> str:
    """
    Find mode.

    :param string: str
    :return: mode
    """
    return max(string, key=string.count) if string else ''