-ene -one cccc cccp cccv ccee ccnc ccne ccnp ccnr ccoc ccpe ccpn ccpp ccpr ccrc ccre ccrp ccvo cec- cece ceco cecp ceec cen- cene ceno ceop ceor cepc cepe cepo cepp cepr cer- cerc cere cern cero cerp cevo cnco cncp cnep cnrc cnrr coce coco cocp coen coep con- conc cone conn cono conv coon coop cope copo copp copr cor- corc core corn coro corp corr cove covo cpce cpep cper cpre cpvc crcc crce crcr cre- crec cree cren creo crep crne croc croe cron croo crop cror crpc cvcc cven cver cvrr eccc ecce ecco ecne eco- econ ecop ecpp ecrc ecrr ecrv eeee eeoc eerc eero eevn en-v ence enco enee eneo ener ennc enne eno- enoc enoe enon enp- eone eore epcc epec epee epen eper epoc epon epor eppc eppo eppp epro eprp ercc erce ercp erec eren erer erev erne erno eroc eroe eron eroo erpe errc erre erro erve even ever evoe evon evoo evop evre nccc nccn nccp nccr ncec ncee ncen ncep ncer ncnc ncoc ncor ncpc ncrc ncre ncrp necc nece neco necr neen neep neer neev nene neno neo- neoc neon neoo nepc nepe nepr nerc nere nero nerr nerv neve nevo nnnn nnpr noce noco noer non- none nonn nono noo- noon nooo noop noor noov nope nor- norc nore norn noro norr norv nov- nove novo npcc npov nppc nren nroc nron nrpc nrpn nrrc nvcc o-eo occc occn oce ocee ocon ocpp ocre ocro ocrr oec- oecc oeec oen- oeno oere oevp onc- once onco one- onec onee oneo onep oner onne onno onon onor oocr ooer oone oooo oore opec open opep oper opo- opon opor oppo orce orco ore- orec oren oreo orer ornc orne orno oro- oroe oron oror orpc orpe orro orve orvr ovee oven over ovo- ovon ovoo ovpp ovre pccc pcce pcep pcer pcoe pcpn pcpp pcrc pcre pece peco pecr peec peen peep peer peev pen- penc pene penn peno peon peor pepe pepo per- perc pere pern pero perp perr perv pnec pnon pnpo pnpp pnro poce poco poer ponc pone pono ponp poon poop poor pop- popc pope popo popp porc pore porn poro porr povo ppcc ppen pper pppn pppo pppp pprc prcc prcp pre- prec pree pren prep prev prnp pro- proc proe pron proo prop prov pvco rccc rcep rcnr rcon rcpo rcvr recc rece recp recr reen reep reev rene renn reno reop repe repo repp repr rere rero reve revo revp rnco rncp rnpv rocc roce roco roen roer roev ronc rone rono roon roop roor rope ropo rorc rore roro rove rovo rpoe rpon rppn rrrr rv-c rver vcon vecc veen veep veer ven- vene venn veno veor vepe vepr ver- vere vern vero veve vevo voce voer vone vonn vooc voor vor- vore voro vpon vpro vreo vrnn vroc vron vrpn vver vvvv