t (20) → q (17)? That doesn't look right because thmyl would start with q . But maybe ly = in works.
That doesn't look right either. Given the format, it's more likely a or similar. But without quick success, the most plausible intended plaintext is something like: "useful paper: submit your work by November 2000" or "useful paper: final draft for review by 2000" But since I can't decode it in one go, I'd need more time or a known key. thmyl brnamj zf awrj ly alkybwrd kn2000
Better: Let’s actually decode ly assuming l → i and y → n . l (12) to i (9) = -3 y (25) to n (14) = -11? That’s inconsistent unless it’s not a Caesar shift. t (20) → q (17)
ROT13 on thmyl : t→g, h→u, m→z, y→l, l→y → guzly (no). That doesn't look right either
If ciphertext letter → plaintext letter by shifting (Caesar cipher with key 3, decode by shifting left 3):