https://blog.gongquiz.com/2021/11/07/%ec%a0%95%eb%8f%99%ec%9b%90-%eb%bd%95%ec%88%ad%ec%95%84%ed%95%99%eb%8b%b9-%ec%a0%95%eb%8f%99%ec%9b%90-cut-%e3%81%8d/