2.1 TIFUS %EC%97%B4%EA%B5%90%EC%B0%A8%EB%8B%A8%EC%9E%AC%EB%A5%BC %EC%9D%B4%EC%9A%A9%ED%95%9C %EC%99%B8%EB%8B%A8%EC%97%B4%EC%8B%9C%EC%8A%A4%ED%85%9C %EC%86%8C%EA%B0%9C