t → r (t’s left neighbor) h → g m → n y → t l → k So thmyl becomes r g n t k → not English.
Let’s try shifting each letter one key right (to reverse): thmyl tlghram layt llandrwyd
No.
Try ROT13: t→g, h→u, m→z, y→l, l→y → g u z l y t→g, l→y, g→t, h→u, r→e, a→n, m→z → g y t u e n z l→y, a→n, y→l, t→g → y n l g l→y, l→y, a→n, n→a, d→q, r→e, w→j, y→l, d→q → y y n a q e j l q t → r (t’s left neighbor) h →
No.