-ene bbbb bbeb bbet bbpr bebb bebe beeb been beep beer beet bene benn bent benu bere bern berr bert beru bete bett betu beur bner bnet bnpp bnrr breb bree bren brep brer bret brrr brue brun brup brut btbp bten btrt bttb bubb bube bubu buen buer bueu bunb bune bunn bunt bunu bur- burb bure burn burp burr burt buru but- bute butt ebbr eben eber ebru ebur eeee eent eete eetu enb- enbn enbr enee ener enne ennu enp- ent- ente entp entr enue enur enut epee epen eper eppp eprb eprp epte epub erbb erbe ereb eren erer eret erne erpe erre ertu erub erur etbr etee eten eter etne etnr etre ette ettn ettu etun euer eur- eure eurt n-up nber nbpp nebb nebe nebn nebr nebu neeb neen neep neer neet nene nent nenu nepe nepr nept nere nerr nert neru net- netb nete nett neue neun neur neut neuu nnnn nnpr nntn nprt npte nptn nren nrpn nter nteu ntnu ntru nttr nube nuee nuer nune nunn nunt nupe nure nurn nurp nurr nurt nuru nute nutt nutu peen peep peer peet pen- pene penn pent penu pepe per- pere pern perp perr pert peru pete petn petr pett peun peur peut pnet pneu pnpp pntr pnup ppen pper pppn pppp ppru pptn pptt ppur pre- preb pree pren prep pret preu prnp prtp prtr prue prut pruu pten pter pu-e pube pubu puer puet pueu pune punt punu pupe pupu pur- purb pure purp purr puru put- pute putt putu rbbb rbbr rebb rebe rebu reeb reen reep reet rene renn rent renu repe repp repr rept repu rere rert reru rete retr rett reue reup reut reuu rnbr rnnt rntp rnut rpet rppn rptn rrrr rrun rtee rttp rubb rube rubp rubu ruen ruer ruet rune runn runt rupe rupp rupt rure rurp ruru rute rutt rutu ruun tbrb tbtp tebu teen teer teet tenb tene tenn tenp tent tenu tepe tepp tepu ter- tere tern terp terr teru tete tetr tett tetu teut tneb tnut tper tppp tppr tpte tptp tptr tput tre- tree tren tret treu trpe trpn trpp trte trtr trub true trun trut truu ttbb tten tter tttt tubb tube tubr tubu tuen tuer tuet tunb tune tunn tunu tupe tupu turb ture turn turp turr turt turu tute tutt tutu u-rp ubbe uber ubet unbe uneb unee unen uner unne untb unte unut upbe upen upne upnp uppe uppp uppu upup urbe ure- uret urne urre urte urun urup urur urut utep uter utne uttu uuen uuuu