bbbb bbci bbeb bcbc bcbp bccc bcci bcec bcie bcpp bcuc bcup bebb bebe bebi beci becu beeb beep beic bibb bibe bibi bicc bice bici bieb bieu bipp bipu bpcp bubb bube bubi bubu bucc buce buci bucu bueu buic buie buiu bupc cbbc cbcc cbce cbcp cbcu cbec cbee cbpc cbpp ccbc cccb cccc ccci cccp cccu ccee ccic ccii ccip ccpe ccpp ccuc ccup cebp cebu cec- cece ceci cecp ceeb ceec ceip cepc cepe cepp ceui cibc cibe cibi cicc cici cicu ciee ciii cipp ciuc ciup cpbc cpce cpcu cpeb cpep cpic cub- cubb cube cubi cucc cuce cuci cui- cupe cupp ebbc ebcc ebic ecbc ecbe eccb eccc ecce ecci ecib ecip ecpp eeee eiec eiei epcc epci epec epee epi- epic epie epip eppc eppp epub eubc eubi i-be ibec ibie icbc icbp iccb iccc icci iccp iccu icec icee icpc icub icue icup iecc ieie iiie iiii iiuc ipcc ipce ipec ipie ippc iucc iuce iuiu iupp pbcc pcbc pccc pcce pcep pcip pcpb pcpp pece peci peec peep peip pepe pepi pibb pibi picc pice pici picu piep piip pipe pipi pipp ppcc ppci ppib ppic ppie pppp pu-e pube pubu puce pueu puiu pupe pupi pupu puuc u-ie ubbe ubbi ubic ubii ubpc ucbc ucci uccp ucpb uepi uipi upbe upci upic upie uppc uppe uppp uppu upup uucp uuuu