-tree bbbee be-er be-ro beber bebot beebe beete beeut bejou bejte beote beour berbe beret berob beroe beror berre berru berte berto betee beter betoo betor betou betre bett- bette betto beuer beure beute bo-bo bobet bobr bobre boero boeur bojer booer boore boort booru borbo boree borer boret borje boro- boroo borot borou borre borro borut botet botou botro botte bottu bouee bouer bouet boure boute bouto brebu breer breet brejo breo- brere breto brett breu- brobo broer broje broto broue brout brrrr bruer bruet brujo brute btr-t bubbe buber bujeo bujor bujru buret buroo burro burru burte burtt burut buteo buter buto- butor butot butou butte butuo butut ebber ebbet ebert eboue ebure eeeee ejure eorre erbbe erber erere eroor erore eroto error errtu erte erter etete etoro etour etree etter eturu eubro eujet euro- eurre jebet jeetu jejur jeroo jerre jerte jetee jeter jette jetto jetut jeure jobbe joe-e jooto joree jotto jotur joure joute jouto ju-ju jubbe jubeb jubet jubur jueju juror juter jutro juuru o-r-b obbet obejo obert obete objet oboro obote oboue obout obreb oerje ojuju oo-er ooooo orbot oreo- orere orero orobe orobo oroer orout orret orter ortet ortoo orube orujo oruro orutu otere otero ototo otour otter ottur oture oubut ouert ouoro oure- outer outjo outre outro outto rebbe reber rebet rebut reere rejto rere- reree reret rerob retee reter retje retro rette retto reuer reuet reute ro-ro robbe robbo rober robo- robor robot robrt robte robur roero rooer roore roote rooue rorbu rorer roteb roter roto- rotor rotot rotte rotto roubt rouer rouet roure route routt rtejr rubee ruber rubor ruere ruete ruter rutte ruutu tbtbt tbutt teber tebet teret tereu terje teror terre terro tert- teruo teter tetr- tetro tette teuto tjebu tjore to-be tobbe tober tobet tobor tobot tobou tobre toerr toeto toobe toore torbe toreo toret torje torob torre torro torte torto tortu torue toter toto- totoe totoo totte toure touro toute treer treet trejo trere trete trett treut troee trott troue trout trubu truer truro trute ttttt tuber tubo- tubou tuero tuotu turbe turbo turbt turet turje turju turot turre turro turtu turut tutee tuteo tutor tutte tutto tuuru uber- ubobo ujue uouee ureo- uroob urooj urour urter urubu urutu utebo uter- utero utro- utror utter uttur utube uturu ututo uuuuu