b-u bbb bbd bbh bbk bbo bbr bbu bdb bdd bdh bdk bdo bdr bdu bhb bhd bhh bhk bho bhr bhu bkb bkk bko bkr bob bod boh bok boo bor bou brb brd brh brk bro brr bru bub bud buh buk buo bur buu dbb dbd dbh dbk dbo dbr dbu ddb ddd ddh ddk ddo ddr ddu dh- dhb dhd dhh dhk dho dhr dhu dkb dkk dko dkr dku dob dod doh dok doo dor dou drb drd drk dro drr dru dub dud duh duk duo dur hbb hbd hbh hbk hbo hbr hbu hdb hdd hdh hdk hdo hdr hdu hhb hhd hhh hhk hho hhr hhu hkb hkd hkh hkk hko hkr hku hob hod hoh hok hoo hor hou hr- hrb hrd hrh hrk hro hrr hru hub hud huh huk huo hur huu kbb kbd kbh kbk kbo kbr kbu kdb kdh kdk kdo kdr kdu khh khk kho khr khu kkb kkh kkk kkr kku kob kod koh kok koo kor kou krd krk kro krr kru kub kud kuh kuk kur kuu ob- obb obd obh obk obo obr obu odb odd odh odo odr odu ohd ohh oho ohr ohu okb okd okk oko okr oku oo- oob ood ooh ook ooo oor or- orb ord orh ork oro orr oru ou- oud ouh ouk ouo our rbb rbd rbh rbk rbo rbr rbu rdb rdd rdh rdo rdr rdu rh- rhb rhd rhh rho rhr rhu rkb rkk rko rku rob rod roh rok roo ror rou rrb rrd rrh rrk rrr rru rub rud ruh ruk ruo rur ruu ubb ubh ubk ubo ubr ubu udb udd udk udo udr udu uhb uhd uhh uho uhr uhu ukb ukk ukr uku uob uod uok uoo uor ur- urb urd urk uro urr uru uur uuu

-hou bbbb bbdd bbdo bd-r bddh bhor bhur bhuu bobb bobo bobu bodb bodh bodo bodu bohd boho bohr bohu boko boku boob bood booh book boor bor- bord borh bork boro borr boru boud bouh bouk bour brdo brkb brob brod broh brok broo bror brou brrr brud bruh bubb bubo bubu budb budd budo budu buho buhr bukh bukk buko buku bur- burb burd burh burk buro burr buru d-bo dddd ddub dhod dhor dhur dobb dobu dod- dodd dodo dohr doko doob dood dook door dord dork doro dorr doru doub doud douk dour drob drod droh drou drub druk druu dub- dubb dubh dubu dudd dudo dudu duhr duhu duku duo- durk duro duru duur hdbk hdod hhhh hkbu hobo hodh hodk hodr hoho hoko hoku hood hook hoor hord hork horo horr houd houk hour hrob hrod hrud hubb hubo hudd hudo hudu huhu huor hurd hurk huro hurr huru huub kbbb kbbd kbbk kbbo kbbr kbbu kbdb kbdo kbdr kbhb kbhh kbhr kbkb kbkk kbko kbkr kbob kbod kbok kboo kbrb kbrd kbrh kbrk kbro kbru kbub kbud kbuk kbur kbuu kdbb kdbr kddb kddd kddk kddr kdkb kdkd kdkk kdko kdkr kdok kdrb kdro kdub kdur khbd khbr khdk khdr khhk khho khkk khkr khob khok khor khou khrd khrk khro khrr khub khud khuk khur kkbb kkbd kkbo kkbr kkdd kkdo kkhb kkhh kkhk kkhr kkkk kkob kkoh kkoo kkor kkrb kkrh kkrk kkro kkrr kkuu kobb kobk kobo kobr kobu kodk kodo kodu kohd kohh koho kohr kohu kokb kokh kokk koko kokr koku koob kook kooo koor koou korb kord kork koro korr koru koub kour kouu krbb krbd krbk krbr krdd krdo krdr krdu krkd krkh krkk krko krkr krku krob krod kroh krok kroo kror krrb krrk krro krrr kruh kruk krur kubb kubd kubo kubr kubu kudd kudo kudu kuhu kukh kukk kuku kuok kuoo kurb kurd kurk kuro kurr kuru kuub kuuk kuur kuuu obbo obkb obok obor obrh obro obuh odbo oddd odoh odoo odor odou odur ohho ohob ohoh ohok okko okok okor okro okur ooho ooku oooh oooo oord orbb orbo orbu ordo ordu orko oro- orok oror orro orub oudh our- ouro ouu- rbbb rbbr rboh rhob rhod rhoh rob- robb robo robu rodd rodo rohr rohu rokh rokk roko rokr roku roob rood rook roor rork roro roru roub roud rouh rouk rrrr rubb rubu rudd rudo ruhh ruhr rukh rukk ruku ruok rurd ruro ruru ruud ubbo ubod ubud udoh udoo uduk uh-d uhoh uhok uhuh ukko ukok ukur uor- urdu urho uro- urok uroo urrh uruk urur uuuu

b-r-k bbook bdoor bhood bhook bhour bhrrd bo-bo bo-ho bobko bobok bobr bodd- bodor bohok bohor bokko bokod bokok bokor boodh booko boord booru borbo bordo borko borku boro- borod borok boroo borou borro boudh boudu bouko bourd brobo brodd brodo brood brook broud brouk brrrr brud- buddh buddu budko budur bukk- bukor buoho buord buroo burro burru burud buruk d-rod d-rok ddddd ddruk dhobb dhubb dhuhr do-do dobok dobro dodoo dodro dohuk dokdo dokhu dokuo doodo dooku dorud doruk douro drbob drobo drood drook drouh drouk du-ku dubbo duddo dudok dudou duduk dukku durok duruh hhhhh hhour ho-ho ho-oh hobor hobro hobub hoddu hodhr hodod hodur hokku hoord horod horro horru hourd hubur hudud hudur huhuh hukok huork hurko hurok huuru k-b-d k-rob khodr khoku khood khoro khour khurd khuru khuur ko-ko kobru kobuk kodok kodur kokko kokor kokou kokur koord kooru korbo korku koror korro koruk koudo krodh krodo kubok kudou kudur kukko kukok kukur kurbu kurku kurud kuruk o-r-b obhor obodo oboro obrok obudu oddur odour odudu oduro oh-oh oh-ok ohour ohrob okkur okobo okoho okoro okubo okuku okuru ooooh ooooo ordro orobo orodo oruku oruro ouoro rhod- rhodo ro-ro robbo robo- robor robur rodbo rodok rodor rohob rohod rohru rokkk roodu rookh rorbu rouko rubor rudkk rudok ruhub u-dub ubobo uh-oh uh-uh uhdoh uhhoh uhhuh uhuru ukobu ukodo urduk uroob urour urubu uuork uuuuu

bbbbbb bhookh bo-hoo bobrok bokoro booboo boohoo borbor borkou boroko bororo boubou boudou boukou bourou brokkr brubru bububu budruk budukh bukkur bukuru burbur