cccc cccl cccp cccu cclc ccoc ccpl ccpp ccpr ccrc ccrl ccrp ccuc ccup cloo clop clor clou clpp clro coco cocp cocu col- coll colo colp colu cool coop copo copp copr cor- corc corl coro corp corr coul coup cour cpcu cplc crcc crcr croc crol croo crop cror crpc crup cucc culc cull culo culp cupl cupo cupp cupr curl curo curr lccc lcor lcpc lcpl lcrl llcc lllc llll lloc lloo locc loco locu loll lolo looc lool loop loor lopp lopu loro loul loup lour louu lppl lprp lroc lrpu lrrc lrrr lull lulu lupo lupu luup occc oclc ocpp ocrl ocro ocrr ocul ocur olcc ollo olor olpc olur oocr oolo oooo opo- opor oppo orco orlo orlu oro- oror orpc orro orup oucc oulu our- ouro ouu- pccc pccl pcll pclo pcpp pcrc pcrl plcc ploc ploo plop plou plpp plup plur poco poll polo polu pool poop poor pop- popc popo popp porc poro porr poul poup pour ppcc pplo pppo pppp pprc ppru ppur prcc prcp prlr pro- proc prol proo prop prou pruu pull pulo pulp pulu pupl pupu pur- purl puro purp purr puru puuc rccc rcpo rocc roco roll rolo rolp rool roop roor ropo rorc roro roru roul roup rrrr rull rulo rupp rurc ruro rurp ruru u-rp uccp ucrc ulcc ulco ullo ullr ulo- uloc ulul uocc uolc uor- uplo upor uppc uppp uppu upup uro- urol uroo urpo urup urur uucp uulu uuoc uuuu