t(20) → m(13) h(8) → a(1) m(13) → f(6) y(25) → r(18) l(12) → e(5) → “mafre” — nonsense.

t(20) → s(19) h(8) → g(7) m(13) → l(12) y(25) → x(24) l(12) → k(11) → “sglxk” — meaningless.

ROT13(“thmyl”) = g u z l y? No. Wait ROT13: t(20) → g(7), h(8)→u(21), m(13)→z(26), y(25)→l(12), l(12)→y(25) → “guzly” — not a word. Given the lack of a clear decoded text, I’ll assume you simply want me to based on the gibberish as a title.

Maybe it’s (Caesar cipher with key 3): t(20) → q(17) h(8) → e(5) m(13) → j(10) y(25) → v(22) l(12) → i(9) So “thmyl” = “qejvi” — no.

But given “pdf” at end, and you say “create paper” — maybe the cipher is just (or +19) to decode.