<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngo-1939, yafinyelela ezingeni elibalulekile kuyi-JN-25, ikhodi yokusebenza yemikhumbi yaseJapane esetshenziselwa imiyalezo ebaluleke kakhulu. Waxazulula ngempumelelo ingxenye ye-cipher yohlelo lwe-5-num olwalusebenzisa amaqembu ezinombolo njengendawo yamagama nezinombolo ezazibuye zifihlwe nge-cipher yedijithali. Ngemva kwalokho, i-Navy yakwazi ukufunda imilayezo ethile evamile, njengokubika ngesimo sezulu, kodwa ingxenye enkulu yemilayezo yayisatholakala. Lo msebenzi kamuva wakhiwa futhi wasetshenziswa ngemuva kokuhlaselwa kwePearl Harbor phakathi nayo yonke iMpi YasePacific futhi wanikeza isixwayiso sangaphambi kokuhlasela kwamaJapane  <response>: eMidway Atoll. Akazange akwazi ukuhlanganyela kulo msebenzi ngoba, ngo-October 1940, wadluliselwa eqenjini elalisebenza ekubhuleni imfihlo ye-Enigma yemikhumbi yempi yaseJalimane. 