cccc ccci cccp ccic ccii ccip ccir ccoc ccpp ccpr ccrc ccri ccrp cicc cici cico cicr ciii cior cipo cipp circ ciri ciro cirr coco cocp coip coir coop copi copo copp copr cor- corc cori coro corp corr cpic cpio cpri crcc crcr cric crip croc croo crop cror crpc iccc icci icco iccp iccr icoc icor icpc icpo icrc icrr iiii iiio iioi iioo iiop iirc ioci iocp ioii ioio iooi iooo iori ipcc ipop ippc ippo ippr ipri ircc iri- iric irio irip iroc irop irpc irrc irri occc occi ocpp ocro ocrr oici oiii oipc oocr oooo opic opii opio opo- opor oppi oppo orci orco ori- oric orio oro- oror orpc orpi orri orro pccc pcip pcpp pcrc picc pici pico picr piip pipi pipo pipp pirc piri piro pirr poco poio poop poor pop- popc popi popo popp porc pori poro porr ppcc ppci ppic pppo pppp pprc prcc prcp pri- prii pro- proc proo prop prri rccc rcic rcpi rcpo ricc rico ripi ripp ripr riri rocc roco roio roir rooi roop roor ropo rorc rori roro rpii rrrr