bbbb bbeb bbet bblb bbrc bcbc bccc bccl bcec bcer bcet bcru bctc bcuc bebb bebe beck becu beeb beek beel beer beet beke bele belk bell belt belu berc bere berk berr bert beru betc bete bett betu beuk beur blbt blcu bleb blee blek blet bleu blkb blrc blub blue blur blut brcb brce breb brec bree brek brel brer bret brkb brrr brtc bruc brue brut btcc btcl btec btek btrc btrt bttb bubb bube bubu bucc buce buck bucu buel buer bueu buke bukk buku bulb bule bulk bull bult bulu bur- burb bure burk burl burr burt buru but- bute butt cbbc cbcc cbce cbcl cbcr cbct cbcu cbec cbee cber cbet cbkl cbkr cblb cblc cbre cbrl cbrt cbtc cbtl ccbc cccb cccc cccl cccu ccee ccel cclc ccrc ccre ccrl ccrt cctb cctc cctl cctt ccuc ccut cebu cec- cece cect ceeb ceec ceel ceke cel- celc cele cell celt cer- cerc cere cerl cert cet- cete ckbc ckbe ckck ckcl cker ckrc cktb clec clee clek cler clet cleu cltb cltc club clue clut crbc crbu crcc crce crcr cre- creb crec cree cret creu crkc crkl crrt crtc crtl crub crue cruk crut ctec ctle ctrc ctrl cub- cubb cube cucc cuce cuck cuek cuer cuk- cuke culb culc cule culk cull cult curb cure curl curr curt cut- cutc cute cutt e-cl ebbc ebbr ebcc ebel eber ebru ebul ebur ecbc ecbe eccb eccc ecce eccl ecct eclt ecrc ecrl ecrr ecru ect- ectc eeee eeke eele eerc eetc eete eetu ekeb ekek eker eket ekur el-b elbe elbu elcb elce elec elee elek eler elet elke elle ellu elte elue elul erbb erbe ercc erce ereb erec erel erer eret erke erle erll errc erre ertl ertu erub eruc erur etbc etbr etcc etec etee etel eter etre ette ettu eubc euer eule eur- eurc eure eurt kbbb kbbc kbbe kbbk kbbl kbbr kbbt kbbu kbcb kbce kbck kbcl kbcr kbct kbcu kbeb kbec kbee kbek kbel kber kbet kbkb kbkk kbkl kbkr kblb kble kbll kblr kblt kblu kbrb kbrc kbre kbrk kbrl kbrt kbru kbtb kbtc kbte kbtk kbtl kbtr kbtt kbub kbuc kbue kbuk kbul kbur kbut kbuu kcbc kcbk kcbl kcbr kcbu kccb kccc kcck kccl kccr kcct kccu kceb kcec kcee kcel kcet kceu kckc kckk kckl kckr kclc kcle kclk kcll kclr kclt kclu kcrc kcrr kcrt kcru kctb kctc kcte kctu kcub kcue kcuk kcul kebb kebc kebe kebr kebt kebu keck kecr keek keel keer keet kekb kekc keke kekl keku kele kelk kell kelt kelu ker- kerb kerc kere kerk kerl kerr kert keru ket- ketc kete ketk ketr kett ketu keul keur kkbb kkbe kkbl kkbr kkbt kkcb kkck kkcl kkcr kkct kkkk kklb kklc kkll kkrb kkrc kkre kkrk kkrl kkrr kkrt kktc kktk kktl kktu kkut kkuu klbb klbc klbe klbl klbt klbu klcb klcc klce klck klcl klcr kleb klec klee klek kler klet klkc klkk klkl klkr kllb kllc klle kllk klrc klrk klrr klru kltc kltk kltr kltt klub klue kluk klur kluu krbb krbe krbk krbl krbr krbt krcb krcc krce krcl krcu kreb krec kree krek kret kreu krkc krke krkk krkr krku krlc krle krlt krrb krrc krre krrk krrl krrr krrt krtc krtk krtr kruc krue kruk krul krur ktbb ktbc ktbl ktbr ktbt ktbu ktcc ktce ktck ktcl ktcr ktec ktee ktek ktel ktkb ktkc ktke ktkk ktkr ktkt ktku ktlb ktlk ktlr ktlt ktlu ktrb ktrc ktre ktrk ktrl ktrr ktrt ktru kttc kttk kttr kttt kttu ktub ktuc ktul kubb kubc kube kubr kubu kucb kucc kuce kucr kuek kuel kueu kuke kukk kukl kuku kulb kule kull kult kulu kurb kure kurk kurl kurr kurt kuru kute kutr kutt kutu kuub kuuk kuul kuur kuuu lbcc lblr lbrt lcbc lccc lcce lcer lcrl lctl le-u lebu lece leck lect leek leel leer leet leke lekk lele lell lelu lerc lere lerk lert lete lett leuc leuk leur llcc llet lleu lllc llll lrrc lrrr ltbl ltcc ltee ltke lttc lttr ltuc lube luce luck luer luke lule lull lulu lure lurk lurt lute luuk rbbb rbbr rbcl rble rcbc rccb rccc rcet rcle rctc rebb rebe rebk rebu recc rece reck recr rect recu reeb reek reel reet reke rekt relb rele rell relt rere rert reru rete retr rett reue reuk reul reut reuu rlee rleu rrle rrrr rtcc rtce rtee rtle rtlt rubb rube rubu ruce ruck ruct ruel ruer ruet ruke rukk ruku rule rulk rull rurc rure ruru rute rutl rutt rutu tbcb tbcc tbce tbrb tccc tccu tctc tcul tebu teck tecl tecr tect teec teek teel teer teet teke tel- telc tele tell telt telu ter- terc tere terk terr teru tete tetr tett tetu teuk teut trcc trcl tre- trec tree trek tret treu trtc trte trtr trub truc true truk trut truu ttbb tter tttt ttul tubb tube tubr tubu tucc tuck tuel tuer tuet tuke tule tulk tull tulu turb turc ture turk turr turt turu tute tutl tutt tutu ubbe ubek uber ubet uble ucbc ucel ucrc ucut uele uell ukcc ukek ukeu ukrc ukur ulbc ulcc uleb ulee ulek ulle ullr ultt uluk ulul urbe ure- uret urke urle urre urte uruk urur urut utec utel uter uttu uulu uuuu