bbbb bbdd bbdo bbin bd-r bdii bdin bibb bibi bibo bidi bido bidr bidu biin bin- bind bini binn bino binu bio- bioi bion biou birb bird biri birn biro birr biru bnib bnin bnor bnrr bobb bobi bobo bobu bodb bodi bodo bodu boi- boid boii boin boiu bond boni bonn bono bonu boob bood boon boor bor- bord bori born boro borr boru boud boun bour brdo brid brin brio brno brob brod bron broo bror brou brrr brud brun bubb bubi bubo bubu budb budd budi budo budu buid buin buir buiu bunb bund buni bunn buno bunu buon bur- burb burd buri burn buro burr buru d-bo dbrn dddd ddub dibb dibo didi dido didu diii din- dini dinn dino dinu dion dior diou dird dirr dobb dobi dobu dod- dodd dodi dodo doid doin dond doni donn dono donr doob dood doon door dord dori dorn doro dorr doru doub doud doun dour drib drin drno drob drod dron drou drub drui druu dub- dubb dubu dudd dudo dudu duid duin duir dunn duno duo- duon duri durn duro duru duur i-no ibdo ibid ibon ibrd ibri ibro iddo idid idin idio idir idno idon idro idub idun iduo iiii iiio iino iioi iioo inbd inbo ind- indi indo indu inid inni inno innr innu ino- inoi inon inor inou inri inro inui inun iobi iod- iodd iodo ioii ioio ioni ionn iono iooi iooo iori ioun irdo iri- irid irin irio irob irod iron irri irun iuiu iuno n-ii nbbo nddb nddo ndor ndri nibi nibo nidd nidi nido niir niiu nind nini nino nion nioo niou niro niru niur nndb nnnn nobi nobo nobu nodi nodo nodu noib noid noin noio noir non- noni nonn nono nonu noo- noob noon nooo noor nor- norb nord nori norn noro norr noun nour nron nrrd nubi nudd nudi nudo nuin nunn nuno nuon nurd nuri nurn nurr nuru obbo obid obin oboi obon obor obri obro odbo oddd oddi odin odio odir odiu odnb odon odoo odor odou odur oido oiii oion ondi ondo onir onni onno onod onon onor onur oobi oodi ooid oooo oord orbb orbi orbo orbu ordn ordo ordu ori- orid orin orio orni orno oro- oron oror orri orro orub ouii ouin ouir oun- ound our- ourn ouro ouu- rbbb rbbr rdio rib- ribo ribu ridd ridi rido riin rind rinn rino rion riou riri rnbr rnin rnod rob- robb robi robo robu rodd rodi rodo roid roin roio roir roiu rond roni rono roob rood rooi roon roor rori roro roru roub roud roun rrrr rrun rubb rubi rubu rudd rudi rudo ruid ruin rund runi runn runo rurd ruri ruro ruru ruud ruun ubbi ubbo ubid ubii ubir ubod ubon ubud uddi udid udin udir udon udoo udun uirr unbd undi undo uni- unii unin unio unir unni unno unon unro uor- urbi urdu urib urin uriu urni uro- uroo urri urun urur uuni uuno uuri uuuu