B-21: 6th Problem

SIGNAL SERVICE, WAR DEPARTMENT, WASHINGTON D.C.

January 1935, the 14th,

Dear students,

In the following problem, we know the beginning of the
message (MESSAGE NUMBER NINE ONE XERO STOP ).

Good Luck !

Frank Rowlett

VTPUT FMVLI XPBDL SFWPM FWQYY NFSNQ XRKOC YFWVG NQBKU NQLWV
GRTMA WFEPO BCXPD HOYJN DEINY WFIJJ EIHAP YXLJW LAGBM UMDXO
PRCYG DNBKR RUSLI MDMRN GVBRD GBLEP UIRAM QFKXW COCPH XNUWA
KYQJR WPRXB DJPDS PHCBG QOONU JWBAO JSDDO YJCDF NNYAR DUCUN
TSUVO YKNOP ISXXJ GAWRO EOMUQ BHWMX MGQVK QNMAF MSYQK GETMH
CDEJY SXWHA FBSFP GQUQM KDMYS JGYUC PAPJK BKXXX