Wait — Let’s test : t(20)→y(25) r(18)→w(23) j(10)→o(15) m(13)→r(18) t(20)→y(25) → ywory — no. Actually, let me reverse it: maybe the cipher is shift -5 :
t(20) ↔ g(7) r(18) ↔ e(5) j(10) ↔ w(23) m(13) ↔ z(26) t(20) ↔ g(7) → gewzg — no, not a word. Wait — I realize: trjmt in rot13 is gewzg — nonsense. But if I instead try rot3 : trjmt qwql mn rby aly awghnda
q(17)→p(16) w(23)→v(22) q(17)→p(16) l(12)→k(11) → pvp k → no y(25)→x(24) → qax
Check: t(20) → w(23) if +3? No.
rby → r(18)→q(17), b(2)→a(1), y(25)→x(24) → qax trjmt qwql mn rby aly awghnda