fydyw nyk tyz myra alnwry w---...
But the in numbers: t=20, h=8, e=5. n=14 (not 20), so not Caesar from n. fydyw nyk tyz myra alnwry w---...
It looks like you’ve provided a string that resembles a cipher or code: fydyw nyk tyz myra alnwry w---
Try rot-1 (shift each letter -1): f→e, y→x, d→c, y→x, w→v → exc xv… still no. Look at nyk — could be “the” (common trigram). If n(14) = t(20) → shift +6? Check: n+6=t(20). Then y(25)+6=31 mod26=5→e. k(11)+6=17→r. So nyk → ter (close to “the” but wrong last letter). If nyk = “the” → requires different mapping. e=5. n=14 (not 20)
So unlikely Atbash. Try rot1 (shift each letter +1): f→g, y→z, d→e, y→z, w→x → gzez x… doesn’t look promising.