def GetIslandSlug(island_url: str) -> str:
    """该函数接收一个小岛 URL，并将其转换成小岛 slug

    Args:
        island_url (str): 小岛 URL

    Returns:
        str: 小岛 slug
    """
    return island_url.replace("https://www.jianshu.com/g/", "")