https://blog.gongquiz.com/2021/01/13/%eb%8b%a4%ec%9d%8c-%eb%aa%85%eb%a0%b9%ec%9d%98-%ea%b2%b0%ea%b3%bc%eb%a1%9c-%ec%84%a4%ec%a0%95%eb%90%98%eb%8a%94-lin-txt-%ed%8c%8c%ec%9d%bc%ec%9d%98-%ed%97%88%ea%b0%80%ea%b6%8c%ec%9c%bc%eb%a1%9c-2/