-form -tree bbbee be-er be-ro beber bebot beebe beeft beete beeut beffe befoe befor befur bembe bembo bemer bemet beofe beoff beote beour berbe beret berme bermo berob beroe berom beror berre berru berte berto berum betee beter betoo betor betou betre bett- bette betto beuer beure beute bo-bo bobet bobr bobre boeme boero boeuf boeur bofet boffo bombe bombo bomer bomet bomme booer boomb boomf boore boort booru borbo boree borer boret bormo boro- borom boroo borot borou borre borro borum borut botet botme botom botou botro botte bottu bouee bouer bouet boure boute bouto brebu breef breem breer breet breme bremm bremo breo- brere breto brett breu- brmmm brobo broer broft brom- brome bromo broom broto broue brout brrrr bruer bruet bruff brume brumm brute btr-t bubbe buber bufet buffe buffo bumbo bumbu bumme buret buroo burro burru burte burtt burut buteo buter butme buto- butor butot butou butte butuo butut ebber ebbet ebert eboue ebure eeeee ef-tu efere efetf effer effet efore efrem efter efuru efutu embee ember embro embue emeer emere emert emmer emmet emore emote emoto emtee emure eofor eomer eorre erbbe erber erem- eremo erere erome eroom eroor erore eroto error errtu erte erter etete etoro etour etree etter eturu eubro eum-u euro- eurre fbomb febre feeme feeor feere fefor femme femoe femto femur feoff feorm feret ferme fermo ferr- ferre ferro ferte feter feto- fetor fette feuer feute fofum fomor foome foore foote fore- foreo foret form- forme forro forte forto forum forur fotte fotur fouee fouet fourb foure fourm fouro freer freet freme fremm frere frett freur frobe frome fromm froom froot frore frote frume frute fruto ftrtt fu-fu fuero fumee fumer fumet furbo furme furo- furor futom futur mbebe mbere mboro mbret mbube mburu mebbe meebo meefe meemu meere meete mefor membe memer memor meout merer meret mero- meroe merom meroo meror merre merte merur meteo meter metoo metr- metre metro mette metur meuer meure meuro meute mmfbm mmmmm mobee mobme mobor mobot mobro moeer moeme moere moero moffe moffo mombo mombu momme momoe momot mooer moore mooro moote mooto morbo moree morem morer moret morfu mormo moror morou morre morro morte morue morum morut moter motet moto- motor motre motru motte motto mottu moure mreru mrmet mrmom mroof mrorr mt-te mt-tf mt-tm mt-tr mt-tt mterf mtfmt mtoto mtree mtume muffe mumbe mumbo mumme mummu muret mureu murom muror murot murre murro murru murum murut muter mutet muto- mutum mutuo muuto o-fer o-r-b obbet obert obete oboro obote oboue obout obreb obrom oerme oerum offer offof offre offto ofoto ofour ofrum ofter ombe- omber ombre omemo omero omore omoro omoto omout oo-er oofem ooooo orbom orbot oreo- orere orero orfeo orfeu orfoe orfor ormer ormet ormur orobe orobo oroer orome oromo orout orret orrum orter ortet ortoo orube oruro orutu otere otero otmer otome otomo ototo otour otter ottom ottur oture oubut oueme ouert oumer ouoro oure- outer outof outre outro outto rebbe reber rebet rebut reefe reeft reeme reemo reere refer refet reffe reffo refme refut remee remer remet remor remou remue remuf reome rere- reree reret rerob rerum retee retem reter retro rette retto reuer reuet reume reute rmutt ro-ro robbe robbo rober robo- robor robot robrt robte robur roero roffe rofor rombe romeo romer romfo romme rooer roofe rooft roome roomu roore roote rooue rorbu rorem rorer roteb rotem roter roto- rotor rotot rotte rotto roubt rouer rouet roufe roume roumm roure route routt rtrfm rubee ruber rubof rubor ruere ruete ruffe ruffo rufo- rumbe rumbo rumer rummo rummu rumor ruomu ruter rutte ruutu tbtbt tbutt teber tebet teeme teemu tefe tembe tembo tembu temoe temof teome terem teret tereu terme termo teror terre terro tert- teruo teter tetr- tetro tette teuto to-be tobbe tober tobet tobor tobot tobou tobre toeof toerr toeto tofet toffo tofor tofte tombe tombo tombu tomer tomme tommo tomo- tomoe tomom tomor tomte toobe toome toore torbe toreo toret torme torob torre torro torte torto tortu torue totem toter toto- totoe totoo totte totum toure touro toute treer treet trefe treff treme trere trete trett treut troee trofe troff troft trome tromm trott troue troum trout trubu truer truff trume truro trute ttttt tu-mo tuber tubo- tubof tubou tuero tuffe tufte tumbe tumbo tumbu tummo tumor tumut tuomo tuotu turbe turbo turbt turem turet turot turre turro turtu turut tutee tuteo tutor tutte tutto tuuru uber- ubobo ubume ufere ufofu uforb umbe- umber umbre umbro umeer umeme umore umour uouee ureme ureo- uroob urour urter urubu urutu utebo uter- utero utmer utro- utror utrum utter uttur utube uturu ututo uuuuu