bbbb bbeb bbet bbox bbrc bcbc bccc bcec bcer bcet bcor bcru bctc bcuc bebb bebe bebo becu beeb beer beet beo- beor beot berc bere bero berr bert beru betc bete beto bett betu beur beux bobb bobe bobo bobu boce boco bocu boec boee boeo boer boet boob booc booe boor boot boox bor- bore boro borr bort boru botb bote boto bott boue bour bout brcb brce breb brec bree breo brer bret brex brob broc broe broo bror brot brou brox brrr brtc bruc brue brut brux btcc btcx btec btex btob btor btrc btrt bttb bubb bube bubo bubu bucc buce buco bucu buer bueu bur- burb bure buro burr burt buru but- bute buto butt c-bo cbbc cbcc cbce cbcr cbct cbcu cbec cbee cber cbet cbot cbox cbre cbrt cbtc cbux ccbc cccb cccc cccu ccee ccob ccoc ccrc ccre ccrt cctb cctc cctt ccuc ccut cebu cec- cece ceco cect ceeb ceec ceor ceou cer- cerc cere cero cert cet- cete ceto ceux cexe cobb cobe cobo cobu coce coco coct cocu coex coob coot cor- corb corc core coro corr cort cotb cotc cote coto cott cotu coub coue cour cout coux coxe crbc crbu crcc crce crcr cre- creb crec cree creo cret creu crex crob croc croe croo cror crot crrt crtc crub crue crut crux ctec ctor ctot ctrc cub- cubb cube cucc cuce cuer curb cure curo curr curt cut- cutc cute cuto cutt cxro cxxx ebbc ebbo ebbr ebcc eber eboe eboo ebor ebox ebro ebru ebur ecbc ecbe eccb eccc ecce ecco ecct eco- ecot ecou ecrc ecrr ecru ect- ectc ecto eeee eeoc eerc eero eetc eete eetu eext eore eotc eoto eoux er-x erbb erbe ercc erce ereb erec erer eret erob eroc eroe eroo errc erre erro ertu erub eruc erur etbc etbr etcc etco etec etee eter etoe etox etre etro ette etto ettu etux eubc euer eur- eurc eure euro eurt exco exec exer exo- exor exrx exte extr o-eo obbo obec ober obet obex oboe obor obot obox obre obro ocbc occc occt oce ocee ocet ocre ocro ocrr oct- octe octo ocur oec- oecc oeec oere oobe oocr ooer oooo oore oort ootb orbb orbe orbo orbu orce orco ore- oreb orec oreo orer orex oro- oroe oror orot orro ortc orte orto orub otee oter oto- otoe otoo otor otre otro otte otto ottu otur oucc ouer our- oure ouro ourt out- outb oute outo ouu- oxer oxo- oxox oxxo rbbb rbbr rcbc rcbo rccb rccc rcet rctc rebb rebe rebo rebu recc rece recr rect recu reeb reet reot reou rere rero rert reru rete reto retr rett reue reut reuu reux rexx rob- robb robe robo robt robu rocc roce roco roer roet roob roor root roox rorc rore roro rort roru rotc rote roto rotr rott roub roue rout roux roxo rrrr rtcc rtce rtee rtex rubb rube rubu ruce ruct ruer ruet rurc rure ruro ruru rute ruto rutt rutu tbcb tbcc tbce tbox tbrb tccc tccu tctc tebo tebu teco tecr tect teec teer teet teor ter- terc tere tero terr teru tete teto tetr tett tetu tetx teut text tobe tobo tobt tobu toce toco toee toer toet toor toot torc tore toro torr tort toru torx totc tote toto totr tott tour tout tox- toxo toxt trcc tre- trec tree treo tret treu trex troc troe troo trot trou trox trtc trte trtr trub truc true trut truu trux ttbb tteo tter ttoe tttt tubb tube tubo tubr tubu tucc tuco tuer tuet tuor turb turc ture turo turr turt turu tute tuto tutt tutu tuuo txtr ubbe ubbo uber ubet uboc ucbc ucrc ucut uext uocc uor- uore urbe ure- uret urex uro- uroo urox urre urte urur urut utec uter utor utto uttu uuoc uuuu uxor uxue xbee xbox xeer xer- xero xert xexe xobc xoco xoro xote xout xoxo xtro xuxu xxxo xxxx