-tree bbbee be-er beber bebti beebe beepi beeri beete beeut beibi beier beipu beire beite beppe beppu berbe berei beret berie berit beriu berre berri berru berte berti betee beter betie betre bett- bette betti beuer beure beute bibbe biber bibie bibri biebe biere bieri biert bieti bieup bipib birie birur biter bitit bitru bitte bitti bitup biure brebu breer breet breit brere brett breu- bribe brier brite britt brrrr bruer bruet bruit bruiu bruri brute btr-t bubbe buber buipe buire buret burie burri burru burte burtt burut buter butit butte butut ebber ebbet ebbie ebert ebibe ebure eeeee eepee eerie eetti eipri eirie eiter eitri eppie epptb epure erbbe erber erept erere erier erite eritu errtu erte erter erupt etete etite etree etter ettie eturu eubie eurre i-bet ibbur ibert ibeti iebet ieiri iepe ieper ierei iette iiiee iiiii iitti iperu ipeti ipiti ippee ippei ipubi irbit irete irite irrep irrit irupi itbit itete itire itrip itter ittre ittti itu-r itu-t ituri ituru itutu iuput iurie p-rep pebi- pebie pebre peebu peere peeri peert peete peire peirt pepee peppe peppi pept- pepup perer peret peri- perie perit perre perri perte perti perur petbe peter petie petit petr- petre petri petru pette petti petur peure piere pieri piert pieup piibe piiri piper pipet pipit pippi pipri pirie pirre pirri pirui piter pitie pitip pitre pitri pitru pitti piuri piuru piute preie prete preti prier priit prite priti pritt prute pter- ptere pteri ptprb ptpre ptprr ptprt ptpru puber pueri puett pupet puppe pupri puree purer purie purre purte puter putit putre putt- putte putti puttu putup puuri re-up rebbe reber rebet rebit rebut reepe reere reeti repet repit reppe reprt repub reput rere- reree reret rerip rerir retee reter retie retip rette reuer reuet reuir reute reuti ribbi riber ribet ribie ribup rieti riper ripit rippe ripup ririe rirpu riuer rripe rubbi rubee ruber rubie rubup ruere ruete ruiru rupee ruper rupie rupit ruter rutte ruutu tbeti tbtbt tbutt teber tebet tebi- teepe teeup tepee tepet tepeu tepit teppu tepui teret tereu terre terri tert- teter tetr- tetri tette ti-ti tibbi tibbu tiber tibet tibur tieit tiere tieri tierp tieup tieut tiper tipet tipit tippi tippu tipup tiree tirer tiret tirit tirru tirur titer titii titre titte titti titup treer treet treib treie treip treit trepp trept trere treri trete trett treut tribe tribu trieb triei trier triet trieu triip tripe tripi tripp tript trit- trite tritt trubu truer truit trupt trute ttttt tuber tubi- tubri tueie tueit tuire tuite tupee tuppi turbe turbi turbt turei turet turie turit turre turri turtu turup turut tutee tutie tutte tutti tuubi tuuei tuuri tuuru u-bit uber- ubirr uitti upeet upier upper uppie upput upter uptie ureit uribe urite urter urubu uruit urupe ururi uruti urutu uter- uteri utier utter uttur utube uturu uuuuu