-ene cccc cccv ccee ccnc ccne ccnr ccrc ccre ccrt cctc cctt cctv cec- cece cect ceec cen- cene cent cer- cerc cere cern cert cet- cete cetv cnet cnrc cnrr cnrt cntc cntr crcc crce crcr cre- crec cree cren cret crne crrt crtc crtv ctec cten ctne ctrc ctrn cttn ctvt cvcc cven cver cvet cvrr cvte eccc ecce ecct ecne ecrc ecrr ecrv ect- ectc ectv eeee eent eerc eetc eete eevn en-v ence enee ener ennc enne ent- ente entr ercc erce erec eren erer eret erev erne errc erre erve etcc etec etee eten eter etne etnr etre ette ettn even ever evet evre n-tv nccc nccn nccr ncct ncec ncee ncen ncer ncnc ncrc ncre nctc ncte nctr nctv necc nece necr nect neen neer neet neev nene nent nerc nere nerr nert nerv net- nete nett netv neve nnnn nntn nnvt nren nrrc ntcc nter ntrc nttr nttv nvcc nvtc nvtv rccc rcet rcnr rctc rctv rcvr recc rece recr rect reen reet reev rene renn rent rere rert rete retr rett reve rnnt rrrr rtcc rtce rtee rtve rv-c rver tccc tcnn tctc tecr tect teec teen teer teet teev tenc tene tenn tent ter- terc tere tern terr tete tetr tett tncc trcc tre- trec tree tren tret trev trtc trte trtr ttcn tten tter tttt tver tvrr tvtv vecc veen veer veet ven- vene venn vent ver- vere vern vert vete vetr veve vret vrnn vtec vten vver vvvv