bbbb bbeb bbpr bbrg bebb bebe bebo beeb beeg beep beer begg bego beo- beor bepo bere berg bero berr bobb bobe bobo boee boeo boep boer boge bogg bogo boob booe boog boop boor bope bopp bor- bore borg boro borr bpoe breb bree breg breo brep brer brob broe brog broo bror brrr ebbo ebbr eber eboe eboo ebor ebpo ebro eeee eerg eero egbe egee eger eggb egge eggo eggp ego- egor egpb egpe egpo egre eore epee eper epor eppo eppp eprb epro eprp erbb erbe ereb erer erg- ergg ergo erob eroe eroo erpe erre erro gbbo gebe geep geer gege gegg gego geo- geog gepe gerb gere gero gggg ggpo gobe gobo goer gogo goog goop goor gope gopo gorb gore gorg goro gorp gorr gper gpgp gprp grbr greb gree greg grep grob grog groo grop gror grrr o-eo obbo ober oboe obor obre obro oegb oere ogb ogbe ogee oger ogge ogog ogre ogro oobe ooer oooo oore opep oper opo- opor oppo orbb orbe orbo ore- oreb oreg oreo orer orge orgo oro- oroe oror orpe orro peep peer pegg pego peor pepe pepo per- pere perg pero perp perr pger pobo poer poge pogg pogo poop poor pop- pope popo popp porb pore porg poro porr pper pppo pppp pre- preb pree preg prep pro- prob proe prog proo prop rbbb rbbr rebb rebe rebo reeb reep rege rego regr reog reop repe repo repp repr rere rerg rero rgbe rob- robb robe robo roeg roer roge rogg rogo roob roog roop roor rope ropo rore roro rpob rpoe rrrr