-ene cccc cccp cccu ccee ccnc ccne ccnp ccnr ccnu ccpe ccpn ccpp ccpr ccrc ccre ccrp ccuc ccup cec- cece cecp ceec ceke cen- cene cepc cepe cepp cepr cer- cerc cere cern cerp ckck cken cker cknc ckpc ckpr ckrc cncp cnep cnrc cnrr cpce cpcu cpep cper cpre crcc crce crcr cre- crec cree cren crep creu crkc crkp crne crpc crue cruk crun crup cucc cuce cuck cucn cuek cuer cuk- cuke cune cunp cupe cupp cupr cure curn curr eccc ecce ecne ecpp ecrc ecrr ecru eeee eeke eerc ekek eken eker ekne ekpe ekur ence enee ener enke enkr ennc enne ennu enp- enue enur epcc epec epee epen eper eppc eppp eprp ercc erce ercp erec eren erer erke erne erpe errc erre eruc erur euer eur- eurc eure kccc kcck kccr kccu kcec kcee kcep kceu kckc kckk kckn kckr kcnp kcnr kcpc kcpn kcpr kcpu kcrc kcrn kcrp kcrr kcru kcue kcuk kcup keck kecr keek keen keep keer kekc keke keku ken- kene kenk kenn kenr kenu kep- kepc kepe kepn kepu ker- kerc kere kerk kern kerp kerr keru keun keup keur kkck kkcn kkcr kken kkkk kkne kknn kknu kkpc kkpk kkpn kkrc kkre kkrk kkrn kkrr kkup kkuu knce knck kncn kncr kncu knec knee knek knen knep kneu knkk knnk knnr knpc knpr knrk knue knuk knur kpcc kpcr kpek kper kpke kpkk kpkr kpnc kpne kpnp kppc kppk kppp kppr kprc kpre kprk kprn kprp kprr kpru kpur krcc krce krcn krcu krec kree krek kren kreu krkc krke krkk krkn krkr krku krne krnk krnn krnp krnu krpr krpu krrc krre krrk krrn krrr kruc krue kruk krun krup krur kucc kuce kucp kucr kuek kuen kueu kuke kukk kukn kuku kunc kune kunk kunp kunr kunu kupe kupr kupu kure kurk kurr kuru kuuk kuur kuuu n-up nccc nccn nccp nccr nccu ncec ncee ncen ncep ncer ncnc ncpc ncrc ncre ncrp ncue ncuk necc nece neck necr neen neep neer neke neku nene nenu nepc nepe nepr nerc nere nerk nerr neru neuc neue neuk neun neur neuu nnnn nnpr npcc nppc nren nrpc nrpn nrrc nuce nuck nucu nuee nuer nuke nuku nunc nune nunk nunn nupe nurc nure nurn nurp nurr nuru nuuk pccc pcce pcep pcer pcpn pcpp pcrc pcre pcun pece peck pecr peec peek peen peep peer peke pekk pen- penc pene penk penn penu pepe per- perc pere perk pern perp perr peru peun peur pnec pneu pnkp pnpp pnup ppcc ppen pper pppn pppp pprc ppru ppur prcc prcp pre- prec pree prek pren prep preu prnp prue pruu pu-e puce puck puer pueu puke puku punc pune punk punu pupe pupu pur- pure purp purr puru puuc rccc rcep rcnr recc rece reck recp recr recu reek reen reep reke rene renk renn renu repe repp repr repu rere reru reue reuk reup reuu rncp rppn rrrr rrun ruce ruck ruen ruer ruke rukk rukn ruku runc rune runk runn rupe rupp rurc rure rurp ruru ruun u-rp uccp ucrc ukcc ukek ukeu uknc ukrc ukup ukur uncc unce uncp unec unee unen uner unke unkn unne unpc upen upne upnp uppc uppe uppp uppu upup ure- urke urne urre uruk urun urup urur uucp uuen uuuu