-ene bbbb bbeb bbrc bcbc bccc bcec bcer bcnu bcru bcuc bebb bebe beck becu beeb beek been beer beke bene benk benn benu berc bere berk bern berr beru beuk beur bner bnrr brcb brce breb brec bree brek bren brer brev brkb brrr bruc brue brun bruv bubb bube bubu bucc buce buck bucu buen buer bueu buke bukk buku bunb bune bunk bunn bunu bur- burb bure burk burn burr buru buve cbbc cbcc cbce cbcn cbcr cbcu cbec cbee cber cbkn cbkr cbre cbrn cbvb cbve cbvn cbvr ccbc ccbn cccb cccc cccu cccv ccee ccnb ccnc ccne ccnr ccnu ccrc ccre ccuc cebu cec- cece ceeb ceec ceke cen- cene cer- cerc cere cern ckbc ckbe ckck ckcv cken cker cknb cknc ckrc cnbc cnrc cnrr crbc crbu crcc crce crcr cre- creb crec cree cren creu crkc crne crub crue cruk crun cub- cubb cube cucc cuce cuck cucn cuek cuer cuk- cuke cune curb cure curn curr cuve cvcc cven cver cvrr ebbc ebbr ebcc eben eber ebru ebur ecbc ecbe eccb eccc ecce ecne ecrc ecrr ecru ecrv eeee eeke eerc eevn ekeb ekek eken eker ekne ekur en-v enb- enbn enbr ence enee ener enke enkr ennc enne ennu enue enur erbb erbe ercc erce ereb erec eren erer erev erke erne errc erre erub eruc erur eruv erve eubc euer eur- eurc eure even ever evre evvk kbbb kbbc kbbe kbbk kbbr kbbu kbcb kbce kbck kbcr kbcu kbeb kbec kbee kbek kben kber kbev kbkb kbkk kbkr kbkv kbnn kbnr kbnu kbnv kbrb kbrc kbre kbrk kbrn kbru kbrv kbub kbuc kbue kbuk kbun kbur kbuu kbvb kbvc kbvr kbvu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kccu kccv kceb kcec kcee kceu kckc kckk kckn kckr kckv kcnb kcnr kcnv kcrc kcrn kcrr kcru kcrv kcub kcue kcuk kcvk kcvr kcvu kcvv kebb kebc kebe kebn kebr kebu keck kecr keek keen keer kekb kekc keke keku ken- kene kenk kenn kenr kenu ker- kerb kerc kere kerk kern kerr keru kerv keun keur keve kkbb kkbe kkbn kkbr kkcb kkck kkcn kkcr kken kkkk kknb kkne kknn kknu kkrb kkrc kkre kkrk kkrn kkrr kkrv kkuu kkvr kkvu kkvv knbb knbc knbe knbn knbr knbu kncb knce knck kncn kncr kncu kneb knec knee knek knen kneu knev knkk knnb knnk knnr knrb knrk knrv knub knue knuk knur knuv knvn knvr krbb krbe krbk krbr krcb krcc krce krcn krcu kreb krec kree krek kren kreu krev krkc krke krkk krkn krkr krku krkv krnb krne krnk krnn krnu krnv krrb krrc krre krrk krrn krrr kruc krue kruk krun krur krvb krvc krve krvk krvn krvr krvv kubb kubc kube kubr kubu kucb kucc kuce kucr kucv kuek kuen kueu kuke kukk kukn kuku kunc kune kunk kunr kunu kunv kurb kure kurk kurr kuru kurv kuub kuuk kuur kuuu kuvr kvbc kvbr kvcb kvcc kvce kvck kvcr kvcu kvcv kvec kven kver kvnc kvne kvnn kvnr kvnu kvrc kvre kvrr kvrv kvue kvuu kvvn kvvr kvvv nbbc nbcc nber ncbc nccc nccn nccr nccu ncec ncee ncen ncer ncnc ncrc ncre ncue ncuk nebb nebe nebn nebr nebu necc nece neck necr neeb neen neer neev neke neku nene nenu nerc nere nerk nerr neru nerv neuc neue neuk neun neur neuu neve nkuv nnnn nren nrrc nubc nube nubk nuce nuck nucu nuee nuer nuke nuku nunc nune nunk nunn nurc nure nurn nurr nuru nurv nuuk nvcc rbbb rbbr rcbc rccb rccc rcnr rcuv rcvr rebb rebe rebk rebu recc rece reck recr recu reeb reek reen reev reke rene renk renn renu rere reru reue reuk reuu reve rnbr rrrr rrun rubb rube rubu ruce ruck ruen ruer ruke rukk rukn ruku runc rune runk runn rurc rure ruru ruun ruve ruvu rv-c rver ubbe ubek uber ucbc ucrc ukcc ukek ukeu uknc ukrc ukur unbe uncc unce uneb unec unee unen uner unke unkn unne urbe ure- urke urne urre uruk urun urur urve uuen uuuu uv-b uv-c uven uver uvvu vbcc vecc veck veen veer veke ven- vene venk venn venu ver- verb vere verk vern veur veve vrnn vruk vuen vuku vunk vurb vver vvvv