The 4 lines of apparent jumble below is a well known poem using a substitution code. A substitution code is where each letter of the alphabet codes to another letter consistently. Spaces and line breaks have been retained; punctuation has been ignored.

DJO WIVULS NULSOF GFUDOE KLT JKVULS GFUD
WIVOE IL LIF KRR DJC PUODC LIF GUD
EJKRR RMFO UD ZKQY DI QKLQOR JKRN K RULO
LIF KRR DJC DOKFE GKEJ IMD K GIFT IN UD

Hint: Try guessing the shorter words first.

  ANSWER

“The Moving Finger writes; and, having writ,
Moves on: nor all thy Piety nor Wit
Shall lure it back to cancel half a Line,
Nor all thy Tears wash out a Word of it”.

From The Rubaiyat of Omar Khayyam.

Ten persons correctly decoded the poem. They were from Christopher Broughton, Richard Birkill, John Stafford, Gordon West, Colin Rowe, Susanne Bone (winner of the draw), John Underwood, Roy Bickler, Clem Robertson and John Moxon (who correctly added the puctuation). Thank you all.