cccc cccp cccu ccoc ccpp ccpr ccrc ccrp ccuc ccup coco cocp cocu coop copo copp copr cor- corc coro corp corr coup cour cpcu crcc crcr croc croo crop cror crpc crup cucc cupo cupp cupr curo curr occc ocpp ocro ocrr ocur oocr oooo opo- opor oppo orco oro- oror orpc orro orup oucc our- ouro ouu- pccc pcpp pcrc poco poop poor pop- popc popo popp porc poro porr poup pour ppcc pppo pppp pprc ppru ppur prcc prcp pro- proc proo prop prou pruu pupu pur- puro purp purr puru puuc rccc rcpo rocc roco roop roor ropo rorc roro roru roup rrrr rupp rurc ruro rurp ruru u-rp uccp ucrc uocc uor- upor uppc uppp uppu upup uro- uroo urpo urup urur uucp uuoc uuuu