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London, CG&GS
April 1930, the 1st,
Dear Dilly,
We intercepted a
message from the Swedish embassy in Berlin.
The message was addressed to the Ministry of Foreign Affairs
in Stockholm. The Swedes use the B-21 machine. I hope you
will be able to solve this message.
We know the beginning
of the message:
maanadsrapport X paa X tyska X politiken X
Good luck !
Alastair Denniston
The cryptogram:
PPLIF VGLPP
EJCBH LIRNT TPCEI KHDHH OOQAU JHRFR
LVMBM EKXPL RDNZV NSCTU VSPGP HPBLA PXXND FBFCU
HIBUI VICHJ PKMSZ PRDAQ VRVAV ZZENB SNLLJ JFPSA
KYSZU GMOAF CFINA HHUGF BUBLE USOOI GFGPO INRRN
XBAVI MSTVV OQZQZ LNAMO ESEBV QAXND KGUOQ RNOPN
DMYBH FBIHM QMDIG UPZEQ PBGRR IQUXM TOCDY AAVJN
ZEPGE JZGQT BHELA HNQXG TTBLH RYGYR HYNUV BOLDO
UIPXV FUMJE KUSDT QZCSU QDPJF JSEHU YVRDH GJMBM
XCPIE KXXXX PPLIF VGLPP
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