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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 async def enter_captcha(self, url: str, sid: str) -> str: """ Override this method for processing captcha. :param url: link to captcha image :param sid: captcha id. I do not know why pass here but may be useful :return captcha value """

        raise VkCaptchaNeeded(url, sid)