def METHOD_NAME(city: str):
    geocache = geonamescache.GeonamesCache()
    dict_of_cities = geocache.get_cities()
    list_of_cities = [d for d in dict_of_cities.values()]
    list_of_city_names = [item["name"] for item in list_of_cities]
    if len(city) > 54:
        return False
    elif type(city) != str:  # noqa: E721
        return False
    elif city in list_of_city_names:
        return True
    else:
        return False