์ด๋ธŒ์ด ์ง€์šฐ๊ณ  ์ŠคํŒŸ์œผ๋กœ ๋‹ค์‹œ๊น”์•˜๋Š”๋ฐ๋„ ์•ฑ์ด ์ด๋ธŒ์ด๊บผ๋กœ๋‚˜์˜ค๋Š”๋ฐ ์„ค์น˜ํ• ๋•Œ keep ๋ง๊ณ  remove๋กœ ํ•ด์•ผ ์ŠคํŒŸ์œผ๋กœ ๊น”๋ฆฌ๋Š”๊ฑด๊ฐ€??