-ene cccc cccp cccu ccee ccnc ccne ccnp ccnr ccnu ccpe ccpn ccpp ccpr ccrc ccre ccrp ccuc ccup cec- cece cecp ceec cen- cene cepc cepe cepp cepr cer- cerc cere cern cerp cncp cnep cnrc cnrr cpce cpcu cpep cper cpre crcc crce crcr cre- crec cree cren crep creu crne crpc crue crun crup cucc cuce cucn cuer cune cunp cupe cupp cupr cure curn curr eccc ecce ecne ecpp ecrc ecrr ecru eeee eerc ence enee ener ennc enne ennu enp- enue enur epcc epec epee epen eper eppc eppp eprp ercc erce ercp erec eren erer erne erpe errc erre eruc erur euer eur- eurc eure n-up nccc nccn nccp nccr nccu ncec ncee ncen ncep ncer ncnc ncpc ncrc ncre ncrp ncue necc nece necr neen neep neer nene nenu nepc nepe nepr nerc nere nerr neru neuc neue neun neur neuu nnnn nnpr npcc nppc nren nrpc nrpn nrrc nuce nucu nuee nuer nunc nune nunn nupe nurc nure nurn nurp nurr nuru pccc pcce pcep pcer pcpn pcpp pcrc pcre pcun pece pecr peec peen peep peer pen- penc pene penn penu pepe per- perc pere pern perp perr peru peun peur pnec pneu pnpp pnup ppcc ppen pper pppn pppp pprc ppru ppur prcc prcp pre- prec pree pren prep preu prnp prue pruu pu-e puce puer pueu punc pune punu pupe pupu pur- pure purp purr puru puuc rccc rcep rcnr recc rece recp recr recu reen reep rene renn renu repe repp repr repu rere reru reue reup reuu rncp rppn rrrr rrun ruce ruen ruer runc rune runn rupe rupp rurc rure rurp ruru ruun u-rp uccp ucrc uncc unce uncp unec unee unen uner unne unpc upen upne upnp uppc uppe uppp uppu upup ure- urne urre urun urup urur uucp uuen uuuu