bbbb bbeb bbet bbrg bebb bebe bebo beeb beeg beer beet begg bego beo- beor beot bere berg bero berr bert bete beto bett bobb bobe bobo boee boeo boer boet boge bogg bogo bogt boob booe boog boor boot bor- bore borg boro borr bort botb bote boto bott breb bree breg breo brer bret brob broe brog broo bror brot brrr btob btor btrt bttb ebbo ebbr eber eboe eboo ebor ebro eeee eerg eero eete egbe egee eger eggb egge eggo ego- egor egot egre egte eore eoto erbb erbe ereb erer eret erg- ergg ergo erob eroe eroo erre erro etbr etee eter etoe etre etro ette etto gbbo gebe geer geet gege gegg gego geo- geog gerb gere gero gert getb gete getg geto gett ggbt gggg gobe gobo goer gogo goog goor goot gorb gore gorg goro gorr gort gote goto gott grbr greb gree greg gret grob grog groo gror grot grrr gtbr gtoe o-eo obbo ober obet oboe obor obot obre obro oegb oere ogb ogbe ogee oger ogge ogog ogre ogro oobe ooer oooo oore oort ootb orbb orbe orbo ore- oreb oreg oreo orer orge orgo oro- oroe oror orot orro orte orto otee oter oto- otoe otog otoo otor otre otro otte otto rbbb rbbr rebb rebe rebo reeb reet rege rego regr regt reog reot rere rerg rero rert rete reto retr rett rgbe rgtr rob- robb robe robo robt roeg roer roet roge rogg rogo roob roog roor root rore roro rort rote rotg roto rotr rott rrrr rtee tbrb tebo teer teet tegg tego tegt teor ter- tere tero terr tete teto tetr tett tobe tobo tobt toee toer toet toge togo togr togt toor toot tore torg toro torr tort tote toto totr tott tre- tree treg treo tret trge troe trog troo trot trte trtr ttbb tteo tter ttoe tttt