bbbb bbeb bbet bebb bebe bebo beeb beej beer beet beo- beor beot bere bero berr bert beru bete beto bett betu beur bobb bobe bobo bobu boee boeo boer boet bojo bojt boju boob booe boor boot bor- bore borj boro borr bort boru botb bote boto bott boue bour bout breb bree breo brer bret brje brob broe broo bror brot brou brrr brue brut btob btor btrt bttb bubb bube bubo bubu buer bueu buje bujo buju bur- burb bure burj buro burr burt buru but- bute buto butt ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeee eero eete eetu ejer ejob ejoo ejot eore eoto erbb erbe ereb erer eret erob eroe eroo erre erro ertu erub erur etbr etee eter etoe etre etro ette etto ettu euer eur- eure euro eurt j-ro jbob jebb jebe jeer jeet jeju jere jero jert jeru jetb jete jett jeur jobe jobo jobu joee jojo joor joot jore joro jort joto jott jour jrbr jube jubu juju jure jurr jute o-eo obbo ober obet oboe obor obot obre obro oere ojeu oobe ooer oooo oore oort ootb orbb orbe orbo orbu ore- oreb oreo orer oro- oroe oror orot orro orte orto orub oruj otee oter oto- otoe otoo otor otre otro otte otto ottu otur ouer ouju our- oure ouro ourt out- outb oute outo ouu- rbbb rbbr rebb rebe rebo rebu reeb reet reot reou rere rero rert reru rete reto retr rett reue reut reuu rob- robb robe robo robt robu roer roet roje rojo roob roor root rore roro rort roru rote rotj roto rotr rott roub roue rout rrrr rtee rubb rube rubu ruer ruet rure ruro ruru rute ruto rutt rutu tbrb tebo tebu teej teer teet tejo teju teor ter- tere terj tero terr teru tete teto tetr tett tetu teut tobe tobo tobt tobu toee toer toet tojo toor toot tore toro torr tort toru tote toto totr tott tour tout tre- tree treo tret treu troe troo trot trou trte trtr trub true trut truu ttbb tteo tter ttoe tttt tubb tube tubo tubr tubu tuer tuet tuor turb ture turo turr turt turu tute tuto tutt tutu tuuo ubbe ubbo uber ubet uor- uore urbe ure- uret uro- uroo urre urte urur urut uter utor utto uttu uuuu