cccc cccl cccp cccu cclc ccoc ccpl ccpp ccuc ccup ckck ckcl ckco ckoc ckoo ckpc clok cloo clop clou clpp cock coco cocp cocu cok- coko col- colk coll colo colp colu cook cool coop copo copp couk coul coup cpcu cplc cucc cuck cuk- culc culk cull culo culp cupl cupo cupp k-lo kccc kcck kccl kccu kckc kckk kckl kcko kclc kclk kcll kclu kcol kcou kcpc kcpl kcpo kcpu kcuk kcul kcup kkck kkcl kkco kkkk kklc kkll kklo kkol kkoo kkpc kkpk kkpl kkup kkuu klcc klck klcl klkc klkk klkl klko kllc kllk kllp kloc klok klol kloo klop klou klpc kluk klup kluu kock kocp kokc kokk koko kokp koku kolc kolk koll kolo kolu kooc kook kool kooo koop koou kopp kopu koul kouu kpcc kpcl kpkk kpkl kplc kplk kplo kplu kpoc kpok kpol kpoo kpop kpou kppc kppk kppl kppo kppp kpul kucc kuco kucp kukk kukl kuku kull kulo kulp kulu kuok kuol kuoo kuop kupl kupu kuuk kuul kuuu lccc lcpc lcpl llcc lllc llll lloc lloo locc lock loco locu lokk loko loll lolo looc look lool loop lopp lopu louk loul loup louu lppl luck luko lull lulu lupo lupu luuk luup occc oclc ocpp ocul okcu okko oklo okok okol okpo okul olcc ollo olpc ooku oolo oooo opo- oppo oucc oulk oulu ouu- pccc pccl pclk pcll pclo pcpp plcc plkk ploc plok ploo plop plou plpp pluk plup pock poco poko poku polk poll polo polu pook pool poop pop- popc popo popp pouk poul poup ppcc pplo pppo pppp puck puku pulk pull pulo pulp pulu pupl pupu puuc uccp ukcc ukko ukok ukup ulcc ulco ullo ulo- uloc uluk ulul uocc uolc uplo uppc uppp uppu upup uucp uulu uuoc uuuu