%ED%99%94%EC%84%B1%EC%88%A0%EB%AA%A8%EC%9E%84%E3%80%94%EB%9D%BC%EC%9D%B8%20secs4%E3%80%95%20%ED%99%94%EC%84%B1%EB%8C%80%ED%99%94%EC%96%B4%ED%94%8C%20%ED%99%94%EC%84%B1%EB%8D%B0%EC%9D%B4%ED%8A%B8%EC%95%B1%E2%88%B5%ED%99%94%EC%84%B1%EC%86%94%EB%A1%9C%E3%8A%93%ED%99%94%EC%84%B1%EC%9E%AC%ED%98%BC%20%E3%83%87%E9%87%B0%20stolidity