def url_to_one_kind(initial_url):
    """Cut initial_url to one kind without http/https and www"""
    if initial_url[0:7] == 'http://':
        initial_url = initial_url[7:]
    if initial_url[0:8] == 'https://':
        initial_url = initial_url[8:]
    if initial_url[0:4] == 'www.':
        initial_url = initial_url[4:]
    return initial_url