Ttbyq Wyak Mhkr Akhr Asdar -

So maybe last word is not ‘ender’ but ‘endet’ is nonsense. So my a=e guess fails unless asdar ≠ ‘ender’. Let’s try asdar = ‘after’? a=e? No, ‘after’ has f. So maybe a is not e.

The phrase is: ttbyq wyak mhkr akhr asdar ttbyq wyak mhkr akhr asdar

Now Atbash on qybtt : q→j, y→b, b→y, t→g, t→g → jbygg (no). So maybe last word is not ‘ender’ but

If the key is short, maybe ttbyq could be hello or there ? Check ttbyq vs hello : h(7) to t(19) = +12; e(4) to t(19) = +15; l(11) to b(1) = -10; l(11) to y(24) = +13; o(14) to q(16) = +2 — not a constant shift, so not Caesar. But repeating key? The phrase is: ttbyq wyak mhkr akhr asdar

Given the ambiguity, I'll stop here. If this is a puzzle from a known set, the answer is likely scrambled differently.

ttbyq reversed = qybtt — nonsense. Reverse letters in each word then Atbash?

Sometimes ciphers shift each letter by word position number. Word1: t t b y q (positions 1–5) Shift back by pos: t(19)-1=18→s, t(19)-2=17→q, b(1)-3=-2→24→y, y(24)-4=20→u, q(16)-5=11→l → sqyul — not right.