cccc cccm cccp ccmc ccmm ccmp ccoc ccom ccpm ccpp ccpr ccrc ccrp cmcc cmmc cmoc cmpc cmpp cmrr coco cocp com- comc comm como comp comr coom coop copo copp copr cor- corc corm coro corp corr cpcm cpmp cppm cprm crcc crcr crmo crmp croc crom croo crop cror crpc mccc mcmc mcop mcpc mcpp mcrc mmcc mmcm mmmc mmmm mmor mmpc mmpr mmrc mmrp moco momo mooc moop moor mopp moro mpcc mpmc mppc mppp mpro mprp mr-c mrcc mrcp mrmc mrrc occc ocom ocpm ocpp ocro ocrr omo- omoo omor omro oocr oooo opo- opor oppo orco ormo oro- orom oror orpc orro pccc pcom pcpm pcpp pcrc pmcc pmmp pmpm pmpo pmrc poco pomo pomp poop poor pop- popc popo popp porc poro porr ppcc ppcm pppo pppp pprc pprm prcc prcp prmc pro- proc prom proo prop prrm rccc rcmp rcpo rmrp rocc roco romm romo romp room roop roor ropo rorc roro rrmc rrmp rrrr