RED: 4th Problem

Munitions Buildings, Washington D.C.

25 may 1936

Dear Mrs Driscoll

We have intercept another message from naval
japonese attaché. Fortunately we know its
beginning :

KAIGUN ATATCHEE KARA YAMAMOTO
ISOROKU MADE OWARI

We know too they still use the separation of vowels
and consonants.

It is possible to deduce from the indicator
(19365) the following elements :
- Direct Mode

- Cipher Mode

- The vowel wheel position (from 1 to 6) : 5

- The consonant wheel position (from 1 to 20) : 4

- The interrupter wheel position (from 1 to 47) : 20

Good luck!

Admiral William D. Leahy,

Cryptogram:

19365 NUUMU GOLAD GMAEW ICOEE VYFYM UEZIW
OMUPO WEURY ROAHY XOHEM ICYQE EICYD AVUCZ

UIXUV UBYSA VIEVE YXEXI HUDIN OBAUA CEDOR
EIFYO XIYDI ZCUJK ORRYL EALAI NANET OBERY
HUOUJ ABYDU JAYON IWYFU MLUOL OANON UEBOK
OQEKY NLEET ORUDA HGALF YYEOZ IXIQO GOBAU

BUEJU JA