-ene bbbb bbeb bbet bblb bebb bebe beeb beel been beer beet bele bell belt belu bene benn bent benu bere bern berr bert beru bete bett betu beur blbt bleb blee blet bleu blub blue blur blut bner bnet bnrr breb bree brel bren brer bret brrr brue brun brut bten btrt bttb bubb bube bubu buel buen buer bueu bulb bule bull bult bulu bunb bune bunn bunt bunu bur- burb bure burl burn burr burt buru but- bute butt ebbr ebel eben eber ebru ebul ebur eeee eele eent eete eetu el-b elbe elbu elee elen eler elet elle ellu elne elte elue elul enb- enbn enbr enee enel ener enne ennu ent- ente entr enue enur enut erbb erbe ereb erel eren erer eret erle erll erne erre ertl ertu erub erur etbr etee etel eten eter etne etnr etre ette ettn ettu etun euer eule eur- eure eurt lblr lbrt le-u lebu leel leen leer leet lele lell lelu lene lenn lent lere lern lert lete lett leun leur llet lleu llll lner lrne lrrr ltbl ltee ltnt lttr lube luer lule lull lulu lune lunn lunt lure lurt lute nber nebb nebe nebn nebr nebu neeb neel neen neer neet nele nell nelt nene nent nenu nere nerl nerr nert neru net- netb nete nett neue neun neur neut neuu nler nlrb nnnn nntn nren nrlb nrrl nrtl nter nteu ntnu ntrl ntru nttr nube nubl nuee nuel nuer nule null nune nunn nunt nure nurl nurn nurr nurt nuru nute nutt nutu rbbb rbbr rble rebb rebe rebu reeb reel reen reet relb rele rell relt rene renn rent renu rere rert reru rete retr rett reue reul reut reuu rlee rleu rnbr rnnt rnut rrle rrrr rrun rtee rtle rtlt rubb rube rubu ruel ruen ruer ruet rule rull rune runn runt rure ruru rute rutl rutt rutu ruun tbrb tebu teel teen teer teet tel- tele tell teln telt telu tenb tene tenn tent tenu ter- tere tern terr teru tete tetr tett tetu teut tlen tneb tnut tre- tree tren tret treu trte trtr trub true trun trut truu ttbb tten tter tttt ttul tubb tube tubr tubu tuel tuen tuer tuet tule tull tulu tunb tune tunn tunu turb ture turn turr turt turu tute tutl tutt tutu ubbe uber ubet uble uele uell uleb ulee ulen ulle ullr ulne ultt ulul unbe uneb unee unen uner unle unne untb unte unut urbe ure- uret urle urne urre urte urun urur urut utel uter utne uttu uuen uulu uuuu