-hou bbbb bbch bbci bbdd bbdo bbrc bcbc bccc bcci bchd bcor bcru bcuc bd-r bdbc bddc bddh bdii bhcc bhir bhoi bhor bhur bhuu bibb bibi bibo bicc bich bici bico bidi bido bidr bidu bihi bihu bio- bioc bioi biou birb bird biri biro birr biru bobb bobi bobo bobu boch boco bocu bodb bodh bodi bodo bodu bohd boho bohr bohu boi- boid boii boiu boob booc bood booh boor bor- bord borh bori boro borr boru boud bouh bour brcb brdo bric brid brih brio brob broc brod broh broo bror brou brrr bruc brud bruh bubb bubi bubo bubu bucc buch buci buco bucu budb budd budi budo budu buhi buho buhr buic buid buir buiu bur- burb burd burh buri buro burr buru c-bo c-cd cbbc cbcc cbcr cbcu cbdb cbdc cbdi cbdo cbid cbir cbrd cbrh ccbc cccb cccc ccci cccu ccdc ccdh ccdi ccdr cchr ccic ccid ccii ccir ccob ccoc ccod ccrc ccri ccuc cd-r cddb cddr cdic cdii cdio chch chci chdi chib chic chid chih chir chiu choc chod choh choi choo chor chou chrb chrc chrd chro chrr chub chud chui chur cibc cibi cibo cicc cich cici cico cicr cicu cidc cidi cidr cihr ciid ciii ciob cior cirb circ cirh ciri ciro cirr ciuc cobb cobh cobi cobo cobu coch coco cocu codd codi coho coir coob cood cooh cor- corb corc cord cori coro corr coub coud cour crbc crbu crcc crcr crdc crib cric criu crob croc crod croh croo cror crub crud cub- cubb cubi cucc cuci cudi cui- cuir curb curd curi curo curr d-bo dbcc dcbc dccb dccc dcci dccu dcdb dcii dcio dddd ddoc ddrc ddub dhod dhor dhur dibb dibo dich dici dico didi dido didu dihu diii dioc dior diou dird dirr dobb dobi dobu doch doci doco docu dod- dodd dodi dodo dohc dohr doid doob dood door dorc dord dori doro dorr doru doub douc doud dour drbc drib dric drih drob drod droh drou drub drui druu dub- dubb dubc dubh dubu duch duco dudd dudo dudu duhr duhu duid duir duo- duri duro duru duur h-ii hbcd hbic hbio hboc hcbc hccb hccc hcch hcdr hchi hcrd hdci hdoc hdod hdri hhhh hi-c hibi hibu hicc hich hico hidi hihc hihi hiho hiiu hiob hioc hird hiri hiro hiru hobo hoch hocr hodh hodi hodr hoho hoid hoir hood hoor horc hord hori horo horr houd hour hrdc hrib hrid hrob hrod hrrc hrud hubb hubi hubo huch hucu hudd hudi hudo hudu huhi huhu huib huid huir huor hurd huri huro hurr huru huub ibdo ibid ibrc ibrd ibri ibro icbc icbd iccb iccc icci icco iccr iccu icdc icdd ichc ichd ichi icho ichr ichu icoc icod icor icrc icrr icru icub idcr iddo idic idid idio idir idoc idrc idro idub iduo ihcc ihdr ihob ihrc ihrd ihub ihud ihuo iicd iiii iiio iioi iioo iirc iiuc iobi ioci iod- iodd iodo ioii ioio iooi iooo iori ircc ircd ircu irdc irdo iri- iric irid irio irob iroc irod iroh irrc irri iucc iuiu obbo obid oboi obor obrh obri obro obuh ocbc occc occi ochi ocro ocrr ocur odbo odci oddd oddi odic odio odir odiu odoh odoo odor odou odur ohcc ohhi ohho ohid ohio ohob ohoh oici oido oiii oobi oocr oodi ooho ooid oooh oooo oord orbb orbi orbo orbu orch orci orco ordo ordu ori- oric orid orio oro- oror orri orro orub oucc ouch oudc oudh ouii ouir our- ouro ouu- rbbb rbbr rboh rcbc rcbo rccb rccc rcdc rchb rcic rcid rcrd rdio rdoc rhib rhio rhob rhoc rhod rhoh rib- ribo ribu ricc rich rico ridc ridd ridi rido riho riou riri rob- robb robi robo robu rocc roch roco rodd rodi rodo rohr rohu roid roio roir roiu roob rood rooi roor rorc rori roro roru roub roud rouh rrrr rubb rubi rubu ruch ruci rudd rudi rudo ruhh ruhi ruhr ruid rurc rurd ruri ruro ruru ruud ubbi ubbo ubic ubid ubii ubir uboc ubod ubud ucbc ucci ucdc ucdd uchi ucho ucio ucrc udbc uddi udic udid udir udoh udoo uh-d uhid uhoh uhuh uirr uocc uor- urbi urch urci urdu urho urib uric uriu uro- uroo urrh urri urur uuoc uuri uuuu