YRRG LFKZU CDFXHKJ TXDV F YRRG SFUHZG GHZK FUZ KPZ VZOUZKV KR PZFXKPJ AHVP KPFK UZIFHW PZFXKPJ UZFOP IFKDUHKJ FWG VDOOZWADXXJ VTFLW
CLUE: K=T
The Cryptoquip is a substation cipher in which one letter stands for another. If you think that X equals O, It will equal O throughout the puzzle. Single letters, short words and words using an apostrophe give you clues to locating vowels. Solution is by trial and error.