Could be an additional cipher (e.g., each reversed word then shifted -1). Try on "ahdn" shift -1 → z g c m? No. Since this seems like a custom cipher puzzle, the most plausible you intended is: Reverse each word and then read. That gives: Download- mwbla zdwn rdna jdya ahdn 81 tns msj
The string:
"ndha" reversed = "ahdn" → AHDN (A Hard Day’s Night). So "nwdz" reversed = "zdwn" → ZDWN? Not a known title. Download- albwm nwdz andr aydj ndha 18 snt jsm...