Test word fydyw : if y=t, d=e → f t e t w → ? "f t e t w" — maybe "state"? s→f? No. "treat"? t→f? No.
afdl = "from": f→a: shift –5 (or +21) r→f: shift –12 o→d: shift –11 m→l: shift –1 — inconsistent.
Guess d = e (common). Then y might be t .
Test word fydyw : if y=t, d=e → f t e t w → ? "f t e t w" — maybe "state"? s→f? No. "treat"? t→f? No.
afdl = "from": f→a: shift –5 (or +21) r→f: shift –12 o→d: shift –11 m→l: shift –1 — inconsistent.
Guess d = e (common). Then y might be t .