bibbo bibio bibri big-i bigig bigoo bigot birgi birgu birou birur bitgo bitit bitru bitti bitto bo-bo bobbi bobr bobri bogor bogot bogu bogur bogut boiro boito booit boort booru borbo borgo borgu borio boro- boroo borot borou borro borut botou botro botti bottu bourg bouri bouto brigg brigi briot briou brito britt brobo broto brout brrrr brugg bruit bruiu bruri btr-t bugit bugoo bugti burgi burgo burgu burio buroo burri burro burru burtt burut butit buto- butor butot butou butuo butut gbiti ggobi gibbi gibi- gigot giitu giour girru gitgo gitig gitit giubo go-go go-oo go-to gobbi gobbo gobig gobio gobir gobot gogoi gogro gogui goibo goito goobi goobo goout gorgo gorir gotit gotoo gotor gotri gotti gotto gotur grgur grigg griot grogg groit groot grott grout grrrr grubb gruit gruiu gruut gtrot gubbi gubbo gubio gubru guggi gugir guiot guiri guiro gurgi gurit guroo gurro gurur gutti i-bot ibbur ibibo ibogo iggri igigi igort igoto iiiii iitti iobit ioooi ioooo iorio iotit iotti irbit irobo irori irour irrit itbig itbit itigi itobi itour itout ittoo ittti itu-r itu-t ituri ituro ituru itutu o-r-b oboro obout ogiri ogogo ogugu oguri oirot oitti oobit ooioo ooooo orbit orbot oribi origi origo orito orobo orout orrgo ortoo oruro orutu otobi otori ototo otour ottir ottoi ottur oubit oubut ouigo ouir- ouoro outgo outro outto ribbi ribo- ribot rig-i rigio rigor rigot ro-ro robbi robbo robo- robor robot robrt robur rogoi roiot rorbu roto- rotor rotot rotti rotto roubt routt rubbi rubio rubor rugii rugir ruiru ruoti rutog ruutu tbtbt tbutt ti-ti tibbi tibbu tibor tibro tibur tigit tigri tiigi tiout tirgo tirig tirit tiro- tiroi tirou tirru tirur titig titii titou titti to-go tobit tobog tobor tobot tobou togou torgo torii torio torit torob torog torri torro torti torto tortu toti- toto- totoo tougu touit touro tribu trigg trigo trior trit- trito tritt trott trout trubu trugg trugo truit truro ttttt tubi- tubo- tubog tubou tubri tugou tuori tuotu turbi turbo turbt turgi turgo turig turio turit turot turri turro turtu turut tutor tutti tutto tuubi tuuri tuuru u-bit ubirr ubobo ugro- ugrug uigur uiro uitti urgut uroob urour urubu uruit ururi uruti urutu utro- utror uttur uturu ututo uuuuu