Whatever...
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https://www.vingle.net/posts/874346-PPT-%ED%85%9C%ED%94%8C%EB%A6%BF-%EB%AC%B4%EB%A3%8C-%EB%8B%A4%EC%9A%B4%EB%A1%9C%EB%93%9C-%EC%82%AC%EC%9D%B4%ED%8A%B8-9%EC%84%A0