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?
Now Atbash on qybtt : q→j, y→b, b→y, t→g, t→g → jbygg (no). 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. If the key is short, maybe ttbyq could be hello or there
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. Now Atbash on qybtt : q→j, y→b, b→y,
Given symmetry, maybe it’s a simple Atbash first, then read? Atbash whole thing: t→g, t→g, b→y, y→b, q→j → ggybj w→d, y→b, a→z, k→p → dbzp m→n, h→s, k→p, r→i → nspi a→z, k→p, h→s, r→i → zpsi a→z, s→h, d→w, a→z, r→i → zhwzi
Try akhr = ekhr → e?h? maybe e a r ? hmm.