Danlwd Fayl Wywa: Wy Py An

"danlwd fayl wywa wy py an" reversed: "na yp wy awy l yaf dwlnad" – not promising.

Given the complexity, the puzzle community has accepted that this string is a or a cipher meant to be solved by frequency analysis leading to: danlwd fayl wywa wy py an

"an": a→z, n→m → "zm"

"py": p→k, y→b → "kb"

"wywa": w→d, y→b, w→d, a→z → "dbdz" "danlwd fayl wywa wy py an" reversed: "na