PURPLE: 5th Problem

Munitions Buildings, Washington D.C.

September 25, 1940

Dear Wilma Berryman,

Your mission is to try to decipher a message
encrypted with the Purple machine. We have
guessed the beginning of this message:

For Z information Z to Z all Z embassies Z stop Z
Message Z three Z eight Z seven Z stop Z

By analyzing the statistics of the messages of the
day, we found the letters that form the SIXES:
ACMNQR

Good luck!

Frank B. Rolett,

DUAZU REOMC MYFJC TJXPC VKTFM YATKB OWOPY

PIVQG DGRJH PDINB SZGZU GGIHW XUNSZ YTOKH

QLPII JLCOU MPXDZ DLIZM UCNAB MYKXC BXURE

GIGSX YQJIE NLALA NNLQT AXANZ ZOORK STSCE

MCREB UFLXG MKHYV ZZHVQ SAQLT NAFAD DOBNR

YFEJM VZQJK CKWAN XREMA MIWTS CHEJF KGMDY

UXMRK IPQIC OMKHM PMZUH LMKDK HHZNH BBUWX

XFNTZ LQZNM UDKZB NUBDP FQYRD HADJI DMGXE

IJAEM CPFWO SKCIJ XAGUF YPFCE WNHKN ZJNRS

VTSJE FWUWU MWAZK QXQTJ MZEEZ DZGLP MCMIU

PBBHU ZPAHD TQENI WQFML WJNVC YSEOP LGHVF

NLGTR HFOQY KDLTW ZMBYS OZIGX XRSTN NSIRW

NQROT WRBNR QXXRR RJZNH TKTYQ REUFG JPRXJ

RHXOX IFFSF JISST ADSCI PKGOR FKVHB KRYQL

SDQCC QYVZO ZDXWM CEUYW JPWSN EQUVA HAFUN

PTUCL BZZGS BSWZR BMAGX MUIWW OOAKB SMSEL

YMFRR KAGOK QKRJJ KAYBY PKQLV KBGAZ CKHDC

RZODB JDI