%EB%8F%99%ED%83%84%ED%9B%84%EB%B6%88%EC%B6%9C%EC%9E%A5%CE%98%20%E3%80%90optop10.%E2%93%92o%EF%BD%8D%E3%80%91%E2%9C%A2%EB%8F%99%ED%83%84%EB%A3%B8%EC%8B%B8%EB%A1%B1%20%EB%8F%99%ED%83%84%EB%A7%88%EC%82%AC%EC%A7%80%20%EB%8F%99%ED%83%84%ED%92%80%EC%8B%B8%EB%A1%B1%E2%9C%B6%EB%8F%99%ED%83%84%EC%B6%9C%EC%9E%A5%EC%98%A4%ED%94%BC%20%EB%8F%99%ED%83%84%EC%95%84%EB%A1%9C%EB%A7%88