-ene bbbb bbch bbeb bbrc bcbc bccc bcec bcer bche bcnu bcru bcuc bebb bebe bech becu beeb been beer behn behr bene benn benu berc bere bern berr beru beur bhcc bher bhur bhuu bner bnrr brcb brce breb brec bree bren brer brrr bruc brue bruh brun bubb bube bubu bucc buce buch bucu buen buer bueu buhe buhr bunb bune bunn bunu bur- burb bure burh burn burr buru cbbc cbcc cbce cbcn cbcr cbcu cbec cbee cber cbre cbrh cbrn ccbc ccbn cccb cccc cccu ccee cche cchr ccnb ccnc ccne ccnr ccnu ccrc ccre ccuc cebu cec- cece ceeb ceec cen- cene cer- cerc cere cern chce chch cheb chec chee cheh chen cher cheu chnb chnc chnr chrb chrc chrn chrr chub chun chur cnbc cnrc cnrr crbc crbu crcc crce crcr cre- creb crec cree creh cren creu crne crub crue crun cub- cubb cube cucc cuce cucn cuer cune curb cure curn curr ebbc ebbr ebcc eben eber ebru ebur ecbc ecbe eccb eccc ecce eche ecne ecrc ecrr ecru eeee eerc ehcc eheh ehen eher eheu ehre enb- enbn enbr ence ench enee ener ennc enne ennu enue enur erbb erbe ercc erce erch ereb erec eren erer erhc erhu erne errc erre erub eruc eruh erur eubc euch euer eur- eurc eure hcbc hccb hccc hcch hebb hebe hebr hech heeb heer hehe hehn hene henh henn henu herb herc here hern herr heru heue heun heur hhhh hnce hree hrrc hrun hubb hube huch hucu huer huhn huhu hunc hune hunh hure hurn hurr huru huub nbbc nbcc nber ncbc nccc nccn nccr nccu ncec ncee ncen ncer nchc ncnc ncrc ncre ncue nebb nebe nebn nebr nebu necc nece nech necr neeb neen neer nehe nehu nene nenh nenu nerc nere nerr neru neuc neue neun neur neuu nhcc nheb nhnn nhrc nnnn nren nrrc nubc nube nuce nuch nucu nuee nuer nunc nune nunn nurc nure nurn nurr nuru rbbb rbbr rcbc rccb rccc rchb rcnr rebb rebe rebu recc rece rech recr recu reeb reen rehb rehe rehn rene renn renu rere reru reue reuu rhce rheb rhee rhen rhue rhun rnbr rrrr rrun rubb rube rubu ruce ruch ruen ruer ruhe ruhh ruhn ruhr runc rune runn rurc rure ruru ruun ubbe uber ucbc uche ucrc uher uhuh unbe uncc unce unch uneb unec unee unen uner unne urbe urch ure- ureh urne urre urrh urun urur uuen uuuu