def append_write(filename="", text=""):
    """
    Function that appends a string at the end of a text file (UTF8) and returns
    the number of characters added.

    Args:
        filename (str): The file name
        text (str): String to write

    Returns:
        The number of characters written
    """
    with open(filename, 'a', encoding='utf8') as f:
        return f.write(text)