bbbb bbdd bbdo bbeb bbet bbrc bcbc bccc bcde bcec bcer bcet bcor bcru bctc bcuc bd-r bdbc bddc bebb bebe bebo becu bede bedo bedu beeb beed beer beet beo- beod beor beot berc berd bere bero berr bert beru betc bete beto bett betu beur bobb bobe bobo bobu boce boco bocu bodb bode bodo bodu boec boee boeo boer boet boob booc bood booe boor boot bor- bord bore boro borr bort boru botb botd bote boto bott boud boue bour bout brcb brce brdo brdt breb brec bred bree breo brer bret brob broc brod broe broo bror brot brou brrr brtc bruc brud brue brut btcc btdt btec btob btor btrc btrt bttb bubb bube bubo bubu bucc buce buco bucu budb budd bude budo budu buer bueu bur- burb burd bure buro burr burt buru but- bute buto butt c-bo c-cd cbbc cbcc cbce cbcr cbct cbcu cbdb cbdc cbdo cbec cbee cber cbet cbot cbrd cbre cbrt cbtc ccbc cccb cccc cccu ccdc ccdr cced ccee ccob ccoc ccod ccrc ccre ccrt cctb cctc cctt ccuc ccut cd-e cd-r cddb cddr cdec cder cdot cdre cebu cec- cece ceco cect cedd cede cedo cedt cedu ceeb ceec ceor ceou cer- cerc cerd cere cero cert cet- cete ceto cobb cobe cobo cobu coce coco coct cocu codd code coed coob cood coot cor- corb corc cord core coro corr cort cotb cotc cote coto cott cotu coub coud coue cour cout crbc crbu crcc crce crcr crdc cre- creb crec cred cree creo cret creu crob croc crod croe croo cror crot crrt crtc crub crud crue crut ctec ctor ctot ctrc cub- cubb cube cucc cuce cude cued cuer curb curd cure curo curr curt cut- cutc cute cuto cutt d-bo dbcc dbtt dcbc dccb dccc dcct dccu dcdb dctc dddd ddoc ddot ddrc ddre ddub debe debt debu dec- decc decd dece deco dect dedd dede dedo dedu deeb deed deer deet deor der- derb derc dere dero derr dete deto detr deue deur deut dobb dobe dobu doce doco doct docu dod- dodd dode dodo doer doob dood door doot dorc dord dore doro dorr dort doru dotd dote doto dott doub douc doud doue dour dout drbc dred dree dret drob drod drot drou drub drue drut druu dtcc dted dtor dtot dub- dubb dubc dube dubu duce duco duct dudd dude dudo dudu duer duet duo- dure duro durt duru dute duur duut ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ebru ebur ecbc ecbe eccb eccc ecce ecco ecct ecdc eced eco- ecod ecot ecou ecrc ecrr ecru ect- ectc ecto eddc edde eddo ede- eder edoc edod edou edru educ edur eede eedu eeee eeoc eerc eero eetc eete eetu eocd eode eore eotc eotd eoto erbb erbe ercc erce erde ereb erec ered erer eret erob eroc erod eroe eroo errc erre erro ertu erub eruc erur etbc etbr etcc etco etec etee eter etoe etre etro ette etto ettu eubc eucd eude euer eur- eurc eure euro eurt o-eo obbo obdt obec obed ober obet oboe obor obot obre obro obtd ocbc occc occt oce oced ocee ocet ocre ocro ocrr oct- octe octo ocur odbo oddd oded odeo oder odet odoo odor odot odou odtu odur oec- oecc oedo oeec oere oobe oocr ooer oooo oord oore oort ootb orbb orbe orbo orbu orce orco orde ordo ordu ore- oreb orec ored oreo orer oro- oroe oror orot orro ortc orte orto orub otbd otcd oted otee oter oto- otoe otoo otor otre otro otte otto ottu otur oucc oudc oude oued ouer our- oure ouro ourt out- outb oute outo ouu- rbbb rbbr rcbc rcbo rccb rccc rcdc rcde rcet rcrd rctc rder rdoc rebb rebe rebo rebu recc recd rece recr rect recu redc redd rede redo redr redu reeb reed reet reod reot reou rerd rere rero rert reru retd rete reto retr rett reue reut reuu rob- robb robe robo robt robu rocc roce roco rodd rode rodo roed roer roet roob rood roor root rorc rore roro rort roru rotc rote roto rotr rott roub roud roue rout rred rrrr rtcc rtce rtdt rtee rubb rube rubu ruce ruct rudd rude rudo rued ruer ruet rurc rurd rure ruro ruru rute ruto rutt rutu ruud tbcb tbcc tbcd tbce tbrb tccc tccu tcdd tctc tddb tdor tebo tebu teco tecr tect tedd tede teec teed teer teet teor ter- terc tere tero terr teru tete teto tetr tett tetu teut tobe tobo tobt tobu toce toco todd tode todo todt todu toed toee toer toet tood toor toot torc tord tore toro torr tort toru totc totd tote toto totr tott tour tout trcc tre- trec tred tree treo tret treu troc trod troe troo trot trou trtc trte trtr trub truc trud true trut truu ttbb tteo tter ttoe tttt tubb tube tubo tubr tubu tucc tuco tude tudu tuer tuet tuor turb turc turd ture turo turr turt turu tute tuto tutt tutu tuuo ubbe ubbo uber ubet uboc ubod ubud ucbc ucdc ucdd ucrc ucut udbc uder udet udoo udot uocc uor- uore urbe urde urdu ure- ured uret uro- uroo urre urte urur urut utec uter utor utto uttu uuoc uuuu