-ene bbbb bbeb bbet bbpr bebb bebe beeb beek been beep beer beet beke bene benk benn bent benu bere berk bern berr bert beru bete bett betu beuk beur bkpr bkpt bner bnet bnpp bnrr breb bree brek bren brep brer bret brkb brrr brue brun brup brut btbp btek bten btrt bttb bubb bube bubu buen buer bueu buke bukk buku bunb bune bunk bunn bunt bunu bur- burb bure burk burn burp burr burt buru but- bute butt ebbr eben eber ebru ebur eeee eeke eent eete eetu ekeb ekek eken eker eket ekne ekpe ekur enb- enbn enbr enee ener enke enkr enne ennu enp- ent- ente entp entr enue enur enut epee epen eper eppp eprb eprp epte epub erbb erbe ereb eren erer eret erke erne erpe erre ertu erub erur etbr etee eten eter etne etnr etre ette ettn ettu etun euer eur- eure eurt kbbb kbbe kbbk kbbr kbbt kbbu kbeb kbee kbek kben kber kbet kbkb kbkk kbkr kbnn kbnp kbnr kbnu kbpe kbpk kbpn kbpr kbpt kbpu kbrb kbre kbrk kbrn kbrt kbru kbtb kbte kbtk kbtn kbtr kbtt kbub kbue kbuk kbun kbup kbur kbut kbuu kebb kebe kebn kebr kebt kebu keek keen keep keer keet kekb keke keku ken- kene kenk kenn kenr kent kenu kep- kepe kepn kept kepu ker- kerb kere kerk kern kerp kerr kert keru ket- kete ketk ketp ketr kett ketu keun keup keur kkbb kkbe kkbn kkbr kkbt kken kkkk kknb kkne kknn kknt kknu kkpk kkpn kkpt kkrb kkre kkrk kkrn kkrr kkrt kktk kktu kkup kkut kkuu knbb knbe knbn knbr knbt knbu kneb knee knek knen knep knet kneu knkk knkt knnb knnk knnr knpb knpr knpt knrb knrk knte kntk kntn kntr kntu knub knue knuk knur knut kpbb kpbe kpbr kpek kper kpet kpke kpkk kpkr kpne kpnp kpnt kppk kppp kppr kprb kpre kprk kprn kprp kprr kprt kpru kpte kptn kptr kptt kpub kpur krbb krbe krbk krbr krbt kreb kree krek kren kret kreu krke krkk krkn krkr krku krnb krne krnk krnn krnp krnt krnu krpr krpt krpu krrb krre krrk krrn krrr krrt krtk krtn krtr krue kruk krun krup krur ktbb ktbn ktbr ktbt ktbu ktee ktek kten ktep ktkb ktke ktkk ktkn ktkr ktkt ktku ktne ktnk ktnn ktnt ktpk ktpr ktpt ktrb ktre ktrk ktrn ktrp ktrr ktrt ktru kttk kttn kttp kttr kttt kttu ktub ktun kubb kube kubr kubu kuek kuen kueu kuke kukk kukn kuku kune kunk kunp kunr kunt kunu kupb kupe kupr kupt kupu kurb kure kurk kurr kurt kuru kute kutp kutr kutt kutu kuub kuuk kuur kuuu n-up nber nbpp nebb nebe nebn nebr nebu neeb neen neep neer neet neke neku nene nent nenu nepe nepr nept nere nerk nerr nert neru net- netb nete nett neue neuk neun neur neut neuu nknt nktr nnnn nnpr nntn nprt npte nptn nren nrpn nter nteu ntnu ntru nttr nube nubk nuee nuer nuke nuku nune nunk nunn nunt nupe nure nurn nurp nurr nurt nuru nute nutt nutu nuuk pbpk peek peen peep peer peet peke pekk pen- pene penk penn pent penu pepe per- pere perk pern perp perr pert peru pete petn petr pett peun peur peut pnet pneu pnkp pnpp pntr pnup ppen pper pppn pppp ppru pptn pptt ppur pre- preb pree prek pren prep pret preu prnp prtp prtr prue prut pruu pten pter pttk pu-e pube pubu puer puet pueu puke puku pune punk punt punu pupe pupu pur- purb pure purp purr puru put- pute putt putu rbbb rbbr rebb rebe rebk rebu reeb reek reen reep reet reke rekt rene renk renn rent renu repe repp repr rept repu rere rert reru rete retr rett reue reuk reup reut reuu rnbr rnnt rntp rnut rpet rppn rptn rrrr rrun rtee rtkn rttp rubb rube rubp rubu ruen ruer ruet ruke rukk rukn ruku rune runk runn runt rupe rupp rupt rure rurp ruru rute rutt rutu ruun tbrb tbtp tebu teek teen teer teet teke tenb tene tenk tenn tenp tent tenu tepe tepp tepu ter- tere terk tern terp terr teru tete tetr tett tetu teuk teut tneb tnpk tnut tper tpke tppp tppr tpte tptp tptr tput tre- tree trek tren tret treu trpe trpn trpp trte trtr trub true truk trun trut truu ttbb tten tter tttt tubb tube tubr tubu tuen tuer tuet tuke tunb tune tunk tunn tunu tupe tupu turb ture turk turn turp turr turt turu tute tutt tutu u-rp ubbe ubek uber ubet ukek ukeu ukup ukur unbe uneb unee unen uner unke unkn unne untb unte unut upbe upen upne upnp uppe uppp uppu upup urbe ure- uret urke urne urre urte uruk urun urup urur urut utep uter utne uttu uuen uuuu