Wait, if ly = in , then l→i (-3), y→n (-3) consistent! Yes! Because y (25) -3 = 22 = w? No — 25-3=22→w, not n. So not consistent. So ly can't be in with a fixed Caesar shift.
ROT13 on thmyl : t→g, h→u, m→z, y→l, l→y → guzly (no). thmyl brnamj zf awrj ly alkybwrd kn2000
So gsnbo yimznq not promising. thmyl reversed = lymht no. Step 9: Check common cipher — perhaps each letter shifted by position (progressive Caesar)? Wait, if ly = in , then l→i (-3), y→n (-3) consistent
So decryption: cipher -3:
thmyl → sglxk (no). Need key — but kn2000 suggests kn might be part of known ? Actually alkybwrd — looks like alkybwrd if shift -3 from cipher: No — 25-3=22→w, not n
b↔y r↔i n↔m a↔z m↔n j↔q → yimznq
But note: kn2000 might mean the key is ? Or it's a citation?