%ED%94%84%EB%A1%9C%EB%AA%A8%EC%85%98%28%EC%99%93%EC%B1%A0%20X%20%EC%9A%94%EA%B8%B0%EC%9A%94%20%EC%9A%94%EA%B8%B0%ED%8C%A8%EC%8A%A4%29%EC%97%90%20%EC%B0%B8%EC%97%AC%ED%95%98%EC%8B%A0%20%EC%9D%B4%EC%9A%A9%EA%B6%8C%EC%9D%80%20%EB%B3%80%EA%B2%BD%EC%9D%B4%20%EB%B6%88%EA%B0%80%EB%8A%A5%ED%95%A9%EB%8B%88%EB%8B%A4