https://blog.faceutil.com/2017/03/15/msx-%ec%98%a4%eb%aa%a9-%eb%82%98%eb%9d%bc%eb%b2%a0-gomok-narabe-%e4%ba%94%e7%9b%ae%e3%81%aa%e3%82%89%e3%81%b9-%ec%98%a4%eb%aa%a9-n/