bbbb bbeb bbet bblb bebb bebe bebo beeb beel beep beet bele bell belo belp belt belu beo- beot bepo bete beto bett betu blbt bleb blee bleo blet bleu blob bloo blop blot blou blub blue blup blut bobb bobe bobo bobu boee boel boeo boep boet bole boll bolo bolt bolu boob booe bool boop boot bope bopp botb bote boto bott boue boul boup bout bpel bpoe bpot btbp btlp btob bttb bubb bube bubo bubu buel bueu bulb bule bull bult bulu buol but- bute buto butt ebbo ebel eboe ebol eboo ebpo ebul eeee eele eete eetu el-b el-p elbe elbo elbu elee eleo elet elle ello ellu elpe elte elto elue elul eole eolo eoto epee eple epll epol epot eppo eppp epte epub etee etel etoe ette etto ettu eule le-u lebo lebu leel leep leet lele lell lelo lelu leou lepe lepo lepp lept lete leto lett llet lleu llll lloo lob- lobb lobe lobo loeb loeu lole loll lolo loob looe lool loop loot lope lopp lopu lote lotl loto lott loue loul loup lout louu lppl lptb ltbl ltee lube lule lull lulu lupe lupo lupu lute luup o-eo obbo obel obet oble oblu oboe obol obot oele olbo ole- oleo olet olle ollo olot olpe oltu oobe oolo oooo ootb ootp opel opep opet ople opo- oppo opto otee otep oto- otoe otoo otpp otte otto ottu oule oulu oupe out- outb oute outo ouu- pblu pebl peel peep peet pel- pelb pele pell pelo pelt pelu peou pepe pepo pete peto pett peul peut ple- pleb plee pleo plet pleu plob ploo plop plot plou plpp pltt plue plup pobo poel poet pole poll polo polt polu pool poop poot pop- pope popo popp popt pote poto pott potu poul poup pout pple pplo pppo pppp pptt ptbl ptol ptop pu-e pube publ pubu puel pueo puet pueu pule pull pulo pulp pult pulu pupe pupl pupu put- pute puto putt putu tbtp tebo tebu teel teet tel- tele tell telo telt telu tepe tepp tepu tete teto tett tetu teut tobe tobo tobt tobu toee toet tol- tole toll tolo tolt tolu tool toot top- tope topo topp topt topu tote toto tott toul toup tout tpol tppp tpte tptp tput ttbb tteo ttoe ttop tttt ttul tubb tube tubo tubu tuel tuet tule tull tulo tulp tulu tupe tupo tupu tute tutl tuto tutt tutu tuuo ubbe ubbo ubet uble ublo uele uell uleb ulee uleo ulle ullo ulo- ulto ultt ulul upbe uplb uplo uppe uppp uppu uptl upto upup utel utep utto uttu uulu uuuu