So decryption: cipher -3:
If ly = in , then: l → i (shift -3) y → n (shift -3) So it might be a in cipher (or -3 in plaintext). Step 2: Test shift -3 on first word thmyl : t-3 = q? Wait, let's map carefully: thmyl brnamj zf awrj ly alkybwrd kn2000
But simpler: maybe but with kn2000 as hint: kn = xa in ROT13? kn in ROT13: k→x, n→a, so xa2000 . Not helpful. Step 10: Try ROT13 on kn2000 → xa2000 not meaningful. So decryption: cipher -3: If ly = in
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. kn in ROT13: k→x, n→a, so xa2000
Given kn2000 , might be in 2000 ? If kn = in, then k→i (-2), n→n (0) not consistent. Let’s check ly again: if ly = of (common): l (12) → o (15) = +3, y (25) → f (6) = 25+3=28 mod 26=2→b? No, that's wrong. Given the complexity, I suspect it's a Caesar shift of +5 (decrypt by -5):
t (20) → q (17)? That doesn't look right because thmyl would start with q . But maybe ly = in works.