-hou bbbb bbch bbdd bbdo bbeb bbrc bcbc bccc bcde bcec bcer bchd bche bcor bcru bcuc bd-r bdbc bddc bddh bebb bebe bebo bech becu bede bedo bedu beeb beed beer behr beo- beod beor berc berd bere bero berr beru beur bhcc bher bhor bhur bhuu bobb bobe bobo bobu boce boch boco bocu bodb bode bodh bodo bodu boec boee boeo boer bohd boho bohr bohu boob booc bood booe booh boor bor- bord bore borh boro borr boru boud boue bouh bour brcb brce brdo breb brec bred bree breo brer brob broc brod broe broh broo bror brou brrr bruc brud brue bruh bubb bube bubo bubu bucc buce buch buco bucu budb budd bude budo budu buer bueu buhe buho buhr bur- burb burd bure burh buro burr buru c-bo c-cd cbbc cbcc cbce cbcr cbcu cbdb cbdc cbdo cbec cbee cber cbrd cbre cbrh ccbc cccb cccc cccu ccdc ccdh ccdr cced ccee cche cchr ccob ccoc ccod ccrc ccre ccuc cd-e cd-r cddb cddr cdec cder cdre cebu cec- cece ceco cedd cede cedo cedu ceeb ceec ceor ceou cer- cerc cerd cere cero chce chch cheb chec ched chee cheh cher cheu choc chod choh choo chor chou chrb chrc chrd chro chrr chub chud chur cobb cobe cobh cobo cobu coce coch coco cocu codd code coed coho coob cood cooh cor- corb corc cord core coro corr coub coud coue cour crbc crbu crcc crce crcr crdc cre- creb crec cred cree creh creo creu crob croc crod croe croh croo cror crub crud crue cub- cubb cube cucc cuce cude cued cuer curb curd cure curo curr d-bo dbcc dcbc dccb dccc dccu dcdb dche dddd ddoc ddrc ddre ddub debe debu dec- decc decd dece deco dedd dede dedo dedu deeb deed deer dehu deor der- derb derc dere dero derr deue deur dhec dhed dhee dher dhod dhor dhur dobb dobe dobu doce doch doco docu dod- dodd dode dodo doer dohc dohr doob dood door dorc dord dore doro dorr doru doub douc doud doue dour drbc dred dree dreh drob drod droh drou drub drue druu dub- dubb dubc dube dubh dubu duce duch duco dudd dude dudo dudu duer duhe duhr duhu duo- dure duro duru duur ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ebru ebur ecbc ecbe eccb eccc ecce ecco ecdc eced eche echo eco- ecod ecou ecrc ecrr ecru eddc edde eddo ede- edeh eder edoc edod edou edru educ edur eede eedu eeee eeoc eerc eero ehcc ehdd eheh eher eheu ehre ehud eocd eode eore erbb erbe ercc erce erch erde ereb erec ered erer erhc erhu erob eroc erod eroe eroo errc erre erro erub eruc eruh erur eubc eucd euch eude euer eur- eurc eure euro hbcd hboc hcbc hccb hccc hcch hcdr hcrd hdoc hdod hebb hebe hebo hebr hech hedd hede hedo heeb heed heer hehe heho heor heou herb herc herd here hero herr heru heue heur hhhh hobe hobo hoce hoch hocr hode hodh hodr hoed hoer hohe hoho hood hooe hoor horc hord hore horo horr houd houe hour hrdc hree hrob hrod hrrc hrud hubb hube hubo huch hucu hudd hude hudo hudu hued huer huhu huor hurd hure huro hurr huru huub o-eo obbo obec obed ober oboe obor obre obrh obro obuh ocbc occc oce oced ocee oche ocre ocro ocrr ocur odbo oddd oded odeo oder odoh odoo odor odou odur oec- oecc oedo oeec oere ohbe ohcc ohed ohee oher ohho ohob ohoh ohre oobe oocr ooer ooho oooh oooo oord oore orbb orbe orbo orbu orce orch orco orde ordo ordu ore- oreb orec ored oreh oreo orer orhe oro- oroe oror orro orub oucc ouch oudc oude oudh oued ouer our- oure ouro ouu- rbbb rbbr rboh rcbc rcbo rccb rccc rcdc rcde rchb rcrd rder rdoc rebb rebe rebo rebu recc recd rece rech recr recu redc redd rede redh redo redr redu reeb reed rehb rehe reod reou rerd rere rero reru reue reuu rhce rheb rhee rheo rhob rhoc rhod rhoh rhue rob- robb robe robo robu rocc roce roch roco rodd rode rodo roed roer rohe rohr rohu roob rood roor rorc rore roro roru roub roud roue rouh rred rrrr rubb rube rubu ruce ruch rudd rude rudo rued ruer ruhe ruhh ruhr rurc rurd rure ruro ruru ruud ubbe ubbo uber uboc ubod ubud ucbc ucdc ucdd uche ucho ucrc udbc uder udoh udoo uh-d uhde uher uhoh uhuh uocc uor- uore urbe urch urde urdu ure- ured ureh urho uro- uroo urre urrh urur uuoc uuuu