-hou bbbb bbdd bbdo bd-r bddh bhor bhur bhuu bnor bnrr bobb bobo bobu bodb bodh bodo bodu bohd bohn boho bohr bohu bond bonn bono bonu boob bood booh boon boor bor- bord borh born boro borr boru boud bouh boun bour brdo brno brob brod broh bron broo bror brou brrr brud bruh brun bubb bubo bubu budb budd budo budu buho buhr bunb bund bunn buno bunu buon bur- burb burd burh burn buro burr buru d-bo dbrn dddd ddub dhod dhor dhrn dhun dhur dobb dobu dod- dodd dodo dohr dond donn dono donr doob dood doon door dord dorn doro dorr doru doub doud doun dour drnh drno drob drod droh dron drou drub druu dub- dubb dubh dubu dudd dudo dudu duhr duhu dunn duno duo- duon durn duro duru duur hdod hhhh hndd hobo hodh hodr hohn hoho hond hono honu hood hoon hoor hord horn horo horr houd hour hrdn hrob hrod hron hrud hrun hubb hubo hudd hudo hudu huhn huhu hund hunh huon huor hurd hurn huro hurr huru huub nbbo nbhd nddb nddo ndor nhnn nhon nndb nnnn nobo nobu nodo nodu nohn noho non- nonn nono nonu noo- noob noon nooo noor nor- norb nord norn noro norr nouh noun nour nron nrrd nudd nudo nunn nuno nuon nurd nurn nurr nuru obbo obon obor obrh obro obuh odbo oddd odnb odoh odon odoo odor odou odur ohho ohno ohob ohoh ohrn ondo onno onod onon onor onur ooho oooh oooo oord orbb orbo orbu ordn ordo ordu orno oro- oron oror orro orub oudh oun- ound our- ourn ouro ouu- rbbb rbbr rboh rhob rhod rhoh rhon rhun rnbr rnod rob- robb robo robu rodd rodo rohn rohr rohu rond rono roob rood roon roor roro roru roub roud rouh roun rrrr rrun rubb rubu rudd rudo ruhh ruhn ruhr rund runn runo rurd ruro ruru ruud ruun ubbo ubod ubon ubud udoh udon udoo udun uh-d uhno uhoh uhuh unbd undo unno unon unro uor- urdu urho uro- uroo urrh urun urur uuno uuuu