해결방법 아시나용
https://ganhwang.com/entry/a%ed%98%95-%eb%8f%85%ea%b0%90-b%ed%98%95-%eb%8f%85%ea%b0%90-%ea%b2%80%ec%82%ac-%eb%b9%84%ec%9a%a9-%eb%93%b1-%eb%82%b4%ec%9a%a9-%ec%b4%9d%ec%a0%95%eb%a6%ac/#google_vignette
https://ganhwang.com/entry/%eb%af%b8%ea%b5%ad%ec%a3%bc%ec%8b%9d-%ec%84%b8%ea%b8%88-%ea%b3%84%ec%82%b0-%ec%84%b8%ea%b8%88-%ec%8b%a0%ea%b3%a0-%eb%b0%8f-%eb%b0%b0%eb%8b%b9%ec%86%8c%eb%93%9d%ec%84%b8-%ec%96%91%eb%8f%84%ec%84%b8-%ed%95%a9%eb%b2%95%ec%a0%81%ec%9d%b8-%ec%a0%88%ec%84%b8-%eb%b0%a9%eb%b2%95-%ec%95%8c%ec%95%84%eb%b3%b4%ea%b8%b0/