cccc cccl cccp cccu cclc ccoc ccpl ccpp cctc cctl cctt ccuc ccup ccut cloo clop clot clou clpp cltc clut coco cocp coct cocu col- coll colo colp colt colu cool coop coot copo copp copt cotc coto cott cotu coul coup cout cpcu cplc cptp ctcp ctol ctot ctpo ctpp cucc culc cull culo culp cult cupl cupo cupp cut- cutc cuto cutt lccc lcpc lcpl lctl lcto llcc lllc llll lloc lloo locc loco locu loll lolo looc lool loop loot lopp lopu lotl loto lott loul loup lout louu lppl ltcc lttc ltuc lull lulu lupo lupu luup occc occt oclc ocpp oct- octo ocul olcc ollo olot olpc oltu oolo oooo ootp opo- oppo opto otcl oto- otoo otpp otto ottu oucc oulu out- outo ouu- pccc pccl pcll pclo pcpp plcc ploc ploo plop plot plou plpp pltt plup poco poll polo polt polu pool poop poot pop- popc popo popp popt potc poto pott potu poul poup pout ppcc pplo pppo pppp pptt ptcc ptcl ptol ptop pttc pull pulo pulp pult pulu pupl pupu put- puto putt putu puuc tccc tccu tcpo tctc tcul tlco toco tol- toll tolo tolt tolu tool toot top- topo topp topt topu totc toto tott toul toup tout tpcp tpol tppp tptp tput ttcp ttop tttt ttul tucc tuco tull tulo tulp tulu tupo tupu tutl tuto tutt tutu tuuo uccp ucut ulcc ulco ullo ulo- uloc ulto ultt ulul uocc uolc uplo uppc uppp uppu uptl upto upup utto uttu uucp uulu uuoc uuuu