uber ubet ubii ubir ubit ueir uirr uor- uore urbe urbi ure- uret urib urie uriu uro- uroo urre urri urte uruq urur urut uter utor utri utti utto uttu utuq uuri uuuu

-tree bbbee bbqer be-er be-ro beber bebot bebti beebe beeri beete beeut beibi beier beire beite beoir beote beour beque berbe berei beret berie berio berit beriu berob beroe beror berre berri berru berte berti berto betee beter betie betio betoo betor betou betre bett- bette betti betto beuer beure beute bibbe bibbo biber bibie bibio bibri biebe biere bieri biert bieti biore bioue bique birie birou birur biter bitit bitru bitte bitti bitto biure bo-bo bobbi bobet bobr bobre bobri boero boeur boibe boier boire boiro boite boito booer booit boore boort booru borbo boree borer boret borio boro- boroo borot borou borre borro borut botet botie botou botro botte botti bottu bouee bouer bouet boure bouri boute bouto brebu breer breet breit breo- brere breto brett breu- bribe brier briot briou brite brito britt brobo broer broto broue brout brrrr bruer bruet bruit bruiu bruri brute btr-t bubbe buber buire buret burie burio buroo burri burro burru burte burtt buruq burut buteo buter butit buto- butor butot butou butte butuo butut ebber ebbet ebbie ebert ebibe eboue ebrio ebure eeeee eerie eetti eieio eirie eiter eitri eorre equi- erbbe erber erere erier erio- erite eritu eroor erore eroto error errtu erte erter etete etio- etite etoro etour etree etter ettie eturu eubie eubro euro- eurre i-beo i-bet i-bot ibbur ibero ibert ibeti ibibo ibore iebet ieiri ierei ieroe iette iiiee iiiii iitti iobit ioooi ioooo iorio iotit iotti iqrit iquit irbit irete irite irobo irori irour irrit itbit itero itete itire itobi itour itout itter ittoo ittre ittti itu-r itu-t ituri ituro ituru itutu iurie o-r-b obbet obeie obert obete oboro obote oboue obout obreb oeiro oirot oitti oo-er oobit ooioo ooooo oorie orbit orbot orebi oreo- oreoi orere orero oribe oribi orito orobe orobo oroer orout orque orret orter ortet ortoo orube oruro orutu otere oteri otero otobi otori ototo otour otter ottir ottoi ottur oture oubit oubut ouert ouir- ouoro oure- ourie outer outie outre outro outto q-tee qbert qebui qoiri qoriq qoroq qorqi qoruq qubit quebo queeb queer queet queir queit queor quere quero quert quete queue quibe quier quiet quire quirt quite quito quitt quobb quoit quore quote quott qureq quruq qutub quurt rebbe reber rebet rebit rebut reere reeti reoti reque rere- reree reret rerir rerob retee reter retie retro rette retto reuer reuet reuir reute reuti ribbi riber ribet ribie ribo- ribot rieti ririe riuer ro-ro robbe robbi robbo rober robie robo- robor robot robrt robte robur roero roiot roite rooer roore roote rooue roque rorbu rorer roteb roter rotie roto- rotor rotot rotte rotti rotto roubt rouer rouet roure route routt rubbi rubee ruber rubie rubio rubor ruere ruete ruiru ruoti ruter rutte ruutu tbeti tbtbt tbutt teber tebet tebi- teito teret tereu teroi teror terre terri terro tert- teruo teter tetr- tetri tetro tette teuto ti-ti tibbi tibbu tiber tibet tibor tibro tibur tieit tiere tieri tiero tieto tieut tiobe tiore tiout tiqiq tiqqi tique tiree tireo tirer tiret tirit tiro- tiroi tirou tirru tirur titer titii titou titre titte titti to-be tobbe tober tobet tobie tobit tobor tobot tobou tobre toeit toerr toeto toobe toore toque toqui torbe toreo toret torii torio torit torob toroq torre torri torro torte torti torto tortu torue toter toti- totie toto- totoe totoo totte touit toure touro toute treer treet treib treie treit trere treri trete trett treut tribe tribu trieb triei trier triet trieu trior trit- trite trito tritt troee troie trott troue trout trubu truer truit truro trute ttttt tuber tubi- tubo- tubou tubri tueie tueit tuero tuire tuite tuori tuotu tuqtu tuque turbe turbi turbo turbt turei turet turie turio turit turot turre turri turro turtu turuq turut tutee tuteo tutie tutor tutte tutti tutto tuubi tuuei tuuri tuuru u-bit uber- ubirr ubobo uiro uitti uouee ureit ureo- uribe urite uroob urour urter urubu uruit ururi uruti urutu utebo uter- uteri utero utier utro- utror utter uttur utube uturu ututo uuuuu

b-tree bbbbbb bbqrub bebeto bebite bebout beebee beeter beiber beirut beitou beqiri bequit berbee berbeo berber bereet berere berour berrer berret berrie bertie bertre berube beruri betere betete betire betrue bettee better bettie bettor betutu beurre bibber bibiri bibiru bieber bierut biobor biotti biribi birori birote birute biteit bitier bitour bitrot bitter bittie bittor bittou bittur biuret bobber bobbie bobbio bobete bobiri bobote boeber boerre boetie boober boobie booboo bootee booter bootie bootit booue boquet boquio borbor borebi boreto borier borore bororo borte botere botero botete botoro botree botter bottie boture boubou boueer bouree bourou bourre bouter boutet boutob boutre boutte breere breite brette bretuo breuer bribe- bribee briber bribir bribri brito- britot broter brotto brouet broute brubru bruree brutii brutti brutto bubber bubbio bububu buique burbet burbot burbur bureit burier burior buriro buriti burotu burree burrer burret burrie burrio bururi burutu butbro butere butter buttie buttir buttto buutuo ebbert ebbout ebr-ii ebrie eburru eebree eerier eibert eototo erbree erebti eroto- errett errori errour etoeot ettore ettutu euerie eurite euroto eururo eutere euttob i-beot i-bere i-bete i-bure i-tree ibero- ibibio ieobet ier-oe ierror iiooio iquito iquote ireout irereo irobot irrite irrour itoite ittiri ittro- iturbe iturbi oberiu oberoi oberto obiter obrute obtree obturb oerter oooooo orbier orbieu orobii orrour ototoi otteri ottoii ottoor ouerre ouioui ourebi out-be outour outreb outter outtro qerret qiutou qorqor quebro queere queite querie queror querre queter quetor queuer quibib quibor quibou quiere quiero quiete quique quirer quirie quirre quiter quitit quitri quobbe quoque quotee quoter quotto qutrit qutrub r-tree rebbit rebite reboot rebore rebote rebour rebuit rebute reiber reiter requit rerobe reroot reteer reteet reteoo retere retire retiro retore retort retour retree retret retro- retrot retter rettur retube returu reueir reuere reuire reuour reuter reutte ribber ribbet ribbie ribbit ribero ribibe ribier rieber rieter riette rietti riot-e rioter riquet rititi ritter