bbbb bblb bffl bfpo bfpp bftt blbt blob bloo blop blot blou blub bluf blup blut bobb bobo bobu boff bofu boll bolo bolt bolu boob boof bool boop boot bopp botb boto bott bouf boul boup bout bpfl bpot bptf btbp btlp btob bttb bubb bubo bubu buff bufo bulb bull bult bulu buol but- buto butt fbop ffff fftf flob floo flop flot flou flub fluf fluo fobt fofo foll folo folt foof fool foot fopp foto fotp fott foul foup fout ft-l ftlb ftop ftub fubb fubu fuff fufu full fulu futo futu lftp llll lloo lob- lobb lobo loff loft loll lolo loob loof lool loop loot lopp lopu lotl loto lott loul loup lout louu lpfp lpft lppl lptb ltbf ltbl luff luft lufu lull lulu lupo lupu luup obbo oblu obol obot off- offo offu oftp olbo ollo olof olot oltu ooff oolo oooo ootb ootp opo- oppo opto otfp oto- otof otoo otpp otto ottu ouff oulu out- outb outo ouu- pblu pfff pfft plff plob ploo plop plot plou plpp pltf pltt plup pobo poff poll polo polt polu poof pool poop poot pop- popo popp popt potf poto pott potu pouf poul poup pout pplo pppo pppp pptt ptbl ptol ptop publ pubu puff puft pull pulo pulp pult pulu pupl pupu put- puto putt putu tbtp tfot tfpt tftp tobo tobt tobu toff tofo toft tofu tol- toll tolo tolt tolu toof tool toot top- topf topo topp topt topu toto tott toul toup tout tpol tppp tptp tput ttbb ttff ttop tttt ttul tubb tubo tubu tuff tufo tuft tufu tull tulo tulp tulu tupo tupu tutl tuto tutt tutu tuuo ubbo ublo ubtf ufpb uftp ulft ullo ulo- ulto ultt ulul uofl uofo uplb uplo uppp uppu uptl upto upup utfo utto uttu uulu uutf uuuu