bbbb bbeb bblb bcbc bcbp bccc bccl bcec bcpl bcpp bcuc bcup bebb bebe bebo becu beeb beel beep bele bell belo belp belu beo- bepo blcu bleb blee bleo bleu blob bloc bloo blop blou blub blue blup bobb bobe bobo bobu boce boco bocu boec boee boel boeo boep bole boll bolo bolu boob booc booe bool boop bope bopp boue boul boup bpcp bpel bpoe bubb bube bubo bubu bucc buce buco bucu buel bueu bulb bule bull bulu buol bupc c-bo cbbc cbcc cbce cbcl cbcp cbcu cbec cbee cblb cblc cbol cbpc cbpp ccbc cccb cccc cccl cccp cccu ccee ccel cclc ccob ccoc ccpe ccpl ccpp ccuc ccup cebp cebu cec- cece ceco cecp ceeb ceec ceel cel- celc cele cell celo ceol ceop ceou cepc cepe cepo cepp clec clee cleo clep cleu clob cloe cloo clop clou clpb clpp club clue cobb cobe cobo cobu coce coco cocp cocu coel coep col- colb cole coll colo colp colu coob cool coop cope copo copp coub coue coul coup cpbc cpce cpcu cpeb cpep cplc cub- cubb cube cucc cuce culb culc cule cull culo culp cupe cupl cupo cupp e-cl ebbc ebbo ebcc ebel eboe ebol eboo ebpo ebul ecbc ecbe eccb eccc ecce eccl ecco eco- ecol ecop ecou ecpp eeee eele eeoc el-b el-p elbe elbo elbu elcb elce elco elec elee eleo elle ello ellu elpe elue elul eole eolo epcc epec epee eple epll epoc epol eppc eppo eppp epub eubc eule lbcc lcbc lccc lcce lcpc lcpl le-u lebo lebu lece leco leel leep lele lell lelo lelu leoc leou lepe lepo lepp leuc llcc lleu lllc llll lloc lloo lob- lobb lobe lobo locc loce loco locu loeb loeu lole loll lolo loob looc looe lool loop lope lopp lopu loue loul loup louu lpec lppl lube luce lule lull lulu lupe lupo lupu luup o-eo obbo obec obel oble oblu oboe obol ocbc occc oce ocee oclc ocpp ocul oec- oecc oeec oele olbo olcc ole- oleo olle ollo olpc olpe oobe oolo oooo opec opel opep ople opo- oppo oucc oule oulu oupe ouu- pbcc pblu pboc pcbc pccc pcce pccl pcep pcll pclo pcoe pcpb pcpp pebl pece pecl peco peec peel peep pel- pelb pele pell pelo pelu peou pepe pepo peul plcc plce ple- pleb plec plee pleo pleu plob ploc ploo plop plou plpp plue plup pobo poce poco poel pole poll polo polu pool poop pop- popc pope popo popp poul poup ppcc pple pplo pppo pppp pu-e pube publ pubu puce puel pueo pueu pule pull pulo pulp pulu pupe pupl pupu puuc ubbe ubbo uble ublo uboc ubpc ucbc uccp ucel ucpb uele uell ulbc ulcc ulco uleb ulee uleo ulle ullo ulo- uloc ulul uocc uolc upbe uplb uplo uppc uppe uppp uppu upup uucp uulu uuoc uuuu