cccc cccl cccp cclc ccoc ccpl ccpp ccpr ccrc ccrl ccrp ckck ckcl ckco ckoc ckoo ckor ckpc ckpr ckrc clok cloo clop clor clpp clro cock coco cocp cok- coko col- colk coll colo colp cook cool coop copo copp copr cor- corc cork corl coro corp corr cplc crcc crcr crkc crkl crkp croc crok crol croo crop cror crpc k-lo kccc kcck kccl kccr kckc kckk kckl kcko kckr kclc kclk kcll kclr kcol kcor kcpc kcpl kcpo kcpr kcrc kcro kcrp kcrr kkck kkcl kkco kkcr kkkk kklc kkll kklo kkol kkoo kkor kkpc kkpk kkpl kkrc kkrk kkrl kkro kkrr klcc klck klcl klcr klkc klkk klkl klko klkr kllc kllk kllp kloc klok klol kloo klop klor klpc klpr klrc klrk klrr kock kocp kokc kokk koko kokp kokr kolc kolk koll kolo kolr kooc kook kool kooo koop koor kopp kopr korc kork korl koro korr kpcc kpcl kpcr kpkk kpkl kpkr kplc kplk kplo kplr kpoc kpok kpol kpoo kpop kppc kppk kppl kppo kppp kppr kprc kprk kprl kpro kprp kprr krcc krcl krco krkc krkk krko krkr krlc kroc krok krol kroo krop kror krpl krpr krrc krrk krrl krro krrr lccc lcor lcpc lcpl lcrl llcc lllc llll lloc lloo locc lock loco lokk loko loll lolo looc look lool loop loor lopp lork loro lppl lprp lroc lrrc lrrr occc oclc ocpp ocrl ocro ocrr okko oklo okok okol okor okpo okro olcc ollo olor olpc oocr oolo oooo opo- opor oppo orco orko orlo oro- orok oror orpc orro pccc pccl pclk pcll pclo pcpp pcrc pcrl pklr plcc plkk ploc plok ploo plop plpp pock poco poko polk poll polo pook pool poop poor pop- popc popo popp porc pork poro porr ppcc pplo pppo pppp pprc prcc prcp prlr pro- proc prol proo prop rccc rcpo rocc rock roco rokk roko rokr rolk roll rolo rolp rook rool roop roor ropo rorc rork roro rrrr