cccc cccp cccu ccoc ccpp ccpr ccrc ccrp ccuc ccup ckck ckco ckoc ckoo ckor ckpc ckpr ckrc cock coco cocp cocu cok- coko cook coop copo copp copr cor- corc cork coro corp corr couk coup cour cpcu crcc crcr crkc crkp croc crok croo crop cror crpc cruk crup cucc cuck cuk- cupo cupp cupr curo curr kccc kcck kccr kccu kckc kckk kcko kckr kcor kcou kcpc kcpo kcpr kcpu kcrc kcro kcrp kcrr kcru kcuk kcup kkck kkco kkcr kkkk kkoo kkor kkpc kkpk kkrc kkrk kkro kkrr kkup kkuu kock kocp kokc kokk koko kokp kokr koku kooc kook kooo koop koor koou kopp kopr kopu korc kork koro korr koru kour kouu kpcc kpcr kpkk kpkr kpoc kpok kpoo kpop kpou kppc kppk kppo kppp kppr kprc kprk kpro kprp kprr kpru kpur krcc krco krcu krkc krkk krko krkr krku kroc krok kroo krop kror krpr krpu krrc krrk krro krrr kruc kruk krup krur kucc kuco kucp kucr kukk kuku kuok kuoo kuop kupr kupu kurk kuro kurr kuru kuuk kuur kuuu occc ocpp ocro ocrr ocur okcu okko okok okor okpo okro okur oocr ooku oooo opo- opor oppo orco orko oro- orok oror orpc orro orup oucc our- ouro ouu- pccc pcpp pcrc pock poco poko poku pook poop poor pop- popc popo popp porc pork poro porr pouk poup pour ppcc pppo pppp pprc ppru ppur prcc prcp pro- proc proo prop prou pruu puck puku pupu pur- puro purp purr puru puuc rccc rcpo rocc rock roco rokk roko rokr roku rook roop roor ropo rorc rork roro roru rouk roup rrrr ruck rukk ruku ruok rupp rurc ruro rurp ruru u-rp uccp ucrc ukcc ukko ukok ukrc ukup ukur uocc uor- upor uppc uppp uppu upup uro- urok uroo urpo uruk urup urur uucp uuoc uuuu