Chapter 7: Analysis of the six-wheel Hagelin cipher machine 
where indicators are unciphered

--- problems:

Excerpt of the "TM-11-380 WAR DEPARTMENT TECHNICAL MANUAL 
CONVERTER M-209", April 27, 1942:

"The message indicator is selected by the operator himself and 
determines for each message the initial positions of the six key 
wheels. It will appear at the beginning and ending of the message.
An example of such a message indicator would be HILQD and the 
wheels would be adjusted so that the letters HHILQD would be 
lined up along the bench mark."

1. Probable words: "british", "japanese", "burma", "india".

  No. 1 - YQPFI AGJVR FLLZJ DCFIA ONRTE 
          JMQAZ FLDDB SBBWX NXATP AYYWJ 
          JOYAS BUPRD ODQMB WCXOO NYIHH 
          JUVAP XRTHQ VYZOV PRUXZ ZAXHQ 
          RXXXX YQPFI

  No. 2 - HCDOA IZXLA XYWLE IXNDN YKMTQ 
          XEOOR AZGHC QRKCO VJOTG ZKDUQ 
          BLYKH EBFOX LNYLR HPHXX GMHYZ 
          MQCAK RCBEC ZUATW TVRZD UIIGB 
          WMHQL ASZRH GUBPM AOFJR MAAWB 
          UPMPS HCDOA 

  No. 3 - RMNFK NQUDA FMKQH YREPO EJGQZ 
          KDHBP RCGKF LUXAC PSPKH FJFAP 
          UQZXD CSLKW VMHKH JIKOP UJGDU 
          VNRCX WGDAH RSBAG VSTMX RMNFK

  No. 4 - DVUKN DGKGK BFJEM GCVOH BYEBT 
          RTTRY NSRQV INFHO KGPTG UGJSH 
          RCCEO PXQLJ SSTGN FGXWR DVUKN 

  No. 5 - VQRJO SLGJY ALWTN JENES YVUGI 
          OPZTL FHYJQ MXPPQ VENNS PYNUY 
          SMADP MAEMX HMIYD PIPAO VSTRC 
          UFPMG EPWIO AWXVC FIJWC LADXT 
          MDLSO IRRZH XMQTF QVEAC OQMAH 
          BPLGP XJZTJ VQRJO

Hint 1 (in caesar cipher): SUREDEOH ZRUG: "QDYB"
Hint 2: SUREDEOH ZRUG: "DLUFUDIW"
Hint 3: SUREDEOH ZRUG: "LQGLDQ RFHDQ"
Hint 4: WZR RYHUODSV ZLWK WKH ZKHHO VHYHQWHHQ
Hint 5: WKHUH LV RQOB RQH OXJ IURQW RI WKH ZKHHO QLQHWHHQ
Hint 6: WKHUH DUH WZHOYH OXJV IURQW RI WKH ZKHHO WZHQWBRQH


2. Probable words: "FORCES", "JAPANESE", "HITLER"

  No. 1 - ASINQ OKUFZ UOVCZ SKZGF JLQUC 
          ANJMJ POILT ABKYL AMEWY UFYGW 
          SXPCZ XURDL FGPZW GDKTN QQNXV 
          TIZZW MQXXX ASINQ 

  No. 2 - JERDI AIRTP EILVO EYVXO FORGD 
          RHWLY LSPQC IPGHR WSCSQ BKPRZ 
          YTRVV WDVCE VXAKM HKEGS JMJWH 
          XUAYR MBAHB JERDI

  No. 3 - VQIPD MDHUX QLPFB EKYLL IXWEU 
          CRULT XZUBK LUIWO AOBBG BCSSG 
          IDLKI CAFJM YKPYI GEGVI XIOPH 
          SFFPC GOUBQ KASDV SWOGD XZQNS 
          ZCFLT IVKAT WXIQB BWVVN RKVTP 
          FVCBP VQIPD

Hint 1 (in caesar cipher): SUREDEOH ZRUG: "SHDUO KDUERU"
Hint 2: WUB VRPH ILJXUH DV SUREDEOH ZRUG
Hint 3: WKHUH LV RQOB RQH OXJ IURQW WKH ZKHHO VHYHQWHHQ
Hint 4: WKHUH DUH HOHYHQ OXJV IURQW RI WKH ZKHHO WZHQWBRQH
Hint 5: WKHUH DUH HLJKW RYHUODSV
Hint 6: WKHUH DUHQ'W DQB RYHUODSV ZLWK ZKHHO QLQHWHHQ DQG VHYHQWHHQ