Puzzle 4

This is a Vigenere cipher. The keyword is FIVE letters long.

PEFDN FIUQC UCRJD PLXTK FLJFJ TYHWC UGJXQ BAJXR
ICXTL FQFXY WCLJL FLJYM QLTHC FXDTS TBTZJ EBFAC
UUPJL FPJWW GCKYF MYYYC SIKYF FWNUF FLYJV UCYTJ
ESTZR IUYYF FEJDU BMKNT FFJYR FLXQM OADTS XIZQB
IUAJR IYSIM OYFKP FKZJL DSHTS ONNSM SXJWR PYXYY
CFNXF IIBRS DBJAC SSKND UBQJR UYWMY EVJJL DUJXY
SMMND UYIDM VQTZJ EBFAC UBJSS OMMND UYIYF FFJYR
FLXFL ELJHM OMYWS DNJIR IYRJQ TULJR IYPJW CSYMC
XUDBY TVZKD Z

Please don't spoil the puzzle by posting a solution. Post help, or requests for help, by all means - but be circumspect.

A solution will appear in one week - so I won't be providing help :)