cccc cccp ccee ccoc ccpe ccpp cec- cece ceco cecp ceec ceke ceop cepc cepe cepo cepp ckck ckco ckcy ckey ckoc ckoo ckoy ckpc coce cock coco cocp coep cok- coke coko coky cook coop cope copo copp copy coyo cpce cpep cyc- cycc cyke cypc cyy- cyyc eccc ecce ecco ecko ecky eco- ecop ecpp eeee eeke eeoc ekco ekek ekpe ekpo epcc epec epee epoc eppc eppo eppp eppy eyck eyec eyey eyke eype kccc kcck kccy kcec kcee kceo kcep kcey kckc kckk kcko kcky kcoe kcpc kcpo kcye kcyk kcyy keck keco keek keep kekc keke keko keok kep- kepc kepe kepy keye keyy kkck kkco kkcy kkkk kkoo kkoy kkpc kkpk kkyc kkyy kock kocp kokc koke kokk koko kokp koky kooc kook kooo koop kope kopp kopy koye koyo koyy kpcc kpek kpke kpkk kpky kpoc kpoe kpok kpoo kpop kpoy kppc kppk kppo kppp kpyk kycc kyck kyee kykc kyke kykk kyky kyok kyoo kyoy kyp- kypc kype kyyk kyyo kyyy o-eo occc oce ocee ocke ocpp oec- oecc oeec oeye oeyo okey okko okok okpe okpo okyo ooky oooo opec opep opo- oppo oppy opye oyce oyee oyke pccc pcce pcep pcoe pcpp pece peck peco pecy peec peek peep peke pekk peko pepe pepo peyo poce pock poco poey poke poko poky pook poop pop- popc pope popo popp popy poyo ppcc pppo pppp ppye pyce pyck pyep pyke pykk pyo- pype pypy yccc ycee yeck yeek yeep yeke yepe yepp yeye yeyo ykep ykey ykko yock yoke yoko yoky yook yoop yopo yopy yoye yoyo ypcc yyyy