%ED%99%94%EC%84%B1%EB%A3%B8%EC%8B%B8%EB%A1%B1%EF%BC%AB%20%E3%80%90optop10.%EF%BC%A3%CE%98%EF%BD%8D%E3%80%91%20%ED%99%94%EC%84%B1%ED%9C%B4%EA%B2%8C%ED%85%94%20%ED%99%94%EC%84%B1op%E2%9C%89%ED%99%94%EC%84%B1op%E2%9C%AE%ED%99%94%EC%84%B1%EC%B6%9C%EC%9E%A5%EC%98%A4%ED%94%BC%E2%99%AE%ED%99%94%EC%84%B1%EA%B1%B4%EB%A7%88