Try (a=1..26, shift +13 mod 26):
t (20) → q (17) t → q b (2) → y (25) y (25) → v (22) q (17) → n (14) → — no. ttbyq msaryf mhkr
Check “zfnels” — ROT13 back? That would be “msaryf” — not English. “zuxe” ROT13 → “mhkr”. Try (a=1
Let’s try :
Hmm, maybe , then ROT13?
t → g t → g b → o y → l q → d space m → z s → f a → n r → e y → l f → s space m → z h → u k → x r → e ttbyq msaryf mhkr