-hou bbbb bbdd bbdo bd-r bddh bdii bhir bhoi bhor bhur bhuu bibb bibi bibo bidi bido bidr bidu bihi bihu bio- bioi biou birb bird biri biro birr biru bobb bobi bobo bobu bodb bodh bodi bodo bodu bohd boho bohr bohu boi- boid boii boiu boob bood booh boor bor- bord borh bori boro borr boru boud bouh bour brdo brid brih brio brob brod broh broo bror brou brrr brud bruh bubb bubi bubo bubu budb budd budi budo budu buhi buho buhr buid buir buiu bur- burb burd burh buri buro burr buru d-bo dddd ddub dhod dhor dhur dibb dibo didi dido didu dihu diii dior diou dird dirr dobb dobi dobu dod- dodd dodi dodo dohr doid doob dood door dord dori doro dorr doru doub doud dour drib drih drob drod droh drou drub drui druu dub- dubb dubh dubu dudd dudo dudu duhr duhu duid duir duo- duri duro duru duur h-ii hbio hdod hdri hhhh hibi hibu hidi hihi hiho hiiu hiob hird hiri hiro hiru hobo hodh hodi hodr hoho hoid hoir hood hoor hord hori horo horr houd hour hrib hrid hrob hrod hrud hubb hubi hubo hudd hudi hudo hudu huhi huhu huib huid huir huor hurd huri huro hurr huru huub ibdo ibid ibrd ibri ibro iddo idid idio idir idro idub iduo ihdr ihob ihrd ihub ihud ihuo iiii iiio iioi iioo iobi iod- iodd iodo ioii ioio iooi iooo iori irdo iri- irid irio irob irod iroh irri iuiu obbo obid oboi obor obrh obri obro obuh odbo oddd oddi odio odir odiu odoh odoo odor odou odur ohhi ohho ohid ohio ohob ohoh oido oiii oobi oodi ooho ooid oooh oooo oord orbb orbi orbo orbu ordo ordu ori- orid orio oro- oror orri orro orub oudh ouii ouir our- ouro ouu- rbbb rbbr rboh rdio rhib rhio rhob rhod rhoh rib- ribo ribu ridd ridi rido riho riou riri rob- robb robi robo robu rodd rodi rodo rohr rohu roid roio roir roiu roob rood rooi roor rori roro roru roub roud rouh rrrr rubb rubi rubu rudd rudi rudo ruhh ruhi ruhr ruid rurd ruri ruro ruru ruud ubbi ubbo ubid ubii ubir ubod ubud uddi udid udir udoh udoo uh-d uhid uhoh uhuh uirr uor- urbi urdu urho urib uriu uro- uroo urrh urri urur uuri uuuu