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 cozz cpcm cpmp cppm cprm crcc crcr crcz crmo crmp croc crom croo crop cror croz crpc mccc mcmc mcop mcoz mcpc mcpp mcrc mmcc mmcm mmmc mmmm mmor mmpc mmpr mmrc mmrp moco momo mooc moop moor mopp moro mozo mpcc mpmc mppc mppp mpro mprp mr-c mrcc mrcp mrmc mroz mrrc occc ocom ocpm ocpp ocro ocrr omo- omoo omor omro oocr oooo opo- opor oppo orco ormo oro- orom oror oroz orpc orro orzo pccc pcom pcpm pcpp pcrc pmcc pmmp pmpm pmpo pmrc poco pomo pomp pomz poop poor pop- popc popo popp porc poro porr porz pozm pozo ppcc ppcm pppo pppp pprc pprm prcc prcp prmc pro- proc prom proo prop proz prrm rccc rcmp rcpo rmrp rocc roco romm romo romp room roop roor rooz ropo rorc roro rozz rrmc rrmp rrrr z-ro zoco zomo zoo- zoom zoop zorc zoro zozo zzzz