%EC%BD%98%ED%81%AC%EB%A6%AC%ED%8A%B8 %EA%B1%B4%EB%AC%BC %EC%99%B8%EB%8B%A8%EC%97%B4 %EB%A7%88%EA%B0%90%EC%9E%AC STO %EB%8C%80%EC%95%88%EC%9D%80%3F