Given it’s a puzzle from a forum (“mntdy ghram” could be “mystery gram”? But “ghram” is close to “gram” and “mntdy” could be “monday” with shift? Let’s check: m→m (0), n→o (+1), t→n (-6?), no).
r (18) → e (5) w (23) → j (10) a (1) → n (14) y (25) → l (12) t (20) → g (7) → “ejnlg” (not right)
But “mntdy” could be “monday” with n→o (+1), t→n (-6), d→d (0), y→a (+? no). Actually monday = m o n d a y. Compare to m n t d y: m=m, o≠n, n≠t, d=d, a≠y. So if each letter shifted differently? Probably not. rwayt myhaf wfysl kamlh bdwn rdwd mntdy ghram
r w a y t m y h a f w f y s l k a m l h b d w n r d w d m n t d y g h r a m
Given the constraint, I suspect the intended plaintext is: — but that doesn’t fit length well. Given it’s a puzzle from a forum (“mntdy
Try Caesar shift +11 (r→c, w→h, a→l, y→j, t→e → “chjle” no).
r→e, w→j, a→n, y→l, t→g → ejnlg m→z, y→l, h→u, a→n, f→s → zluns w→j, f→s, y→l, s→f, l→y → jslfy k→x, a→n, m→z, l→y, h→u → xnzyu b→o, d→q, w→j, n→a → oqja r→e, d→q, w→j, d→q → eqjq m→z, n→a, t→g, d→q, y→l → zagql g→t, h→u, r→e, a→n, m→z → tuenz r (18) → e (5) w (23) →
Row2: a s d f g h j k l ; Left shift: a→(none), s→a, d→s, f→d, g→f, h→g, j→h, k→j, l→k, ;→l