bbbb bbeb bbet bebb bebe bebo beeb beej beer beet beo- beor beot bere bero berr bert bete beto bett bobb bobe bobo boee boeo boer boet bojo bojt boob booe boor boot bor- bore borj boro borr bort botb bote boto bott breb bree breo brer bret brje brob broe broo bror brot brrr btob btor btrt bttb ebbo ebbr eber eboe eboo ebor ebro eeee eero eete ejer ejob ejoo ejot eore eoto erbb erbe ereb erer eret erob eroe eroo erre erro etbr etee eter etoe etre etro ette etto j-ro jbob jebb jebe jeer jeet jere jero jert jetb jete jett jobe jobo joee jojo joor joot jore joro jort joto jott jrbr o-eo obbo ober obet oboe obor obot obre obro oere oobe ooer oooo oore oort ootb orbb orbe orbo ore- oreb oreo orer oro- oroe oror orot orro orte orto otee oter oto- otoe otoo otor otre otro otte otto rbbb rbbr rebb rebe rebo reeb reet reot rere rero rert rete reto retr rett rob- robb robe robo robt roer roet roje rojo roob roor root rore roro rort rote rotj roto rotr rott rrrr rtee tbrb tebo teej teer teet tejo teor ter- tere terj tero terr tete teto tetr tett tobe tobo tobt toee toer toet tojo toor toot tore toro torr tort tote toto totr tott tre- tree treo tret troe troo trot trte trtr ttbb tteo tter ttoe tttt