bbbb bbeb bbox bebb bebe bebo beeb beem beer beme beo- beor bere berm bero berr bevo bobb bobe bobo boee boeo boer bomb bome boob booe boom boor boox bor- bore borm boro borr bove bovo breb bree brem breo brer brev brex brob broe brom broo bror brox brrm brrr brvm ebbo ebbr eber eboe eboo ebor ebox ebro eeee eemo eero embe embo embr emer emex emme emor emre eore er-x erbb erbe ereb erem erer erev erme ermo erob eroe eroo erre erro erve ever evex evoe evoo evre exer exmr exo- exor exrx mbox mebe mebo meem meer meme memo memr memx meor mer- merb mere merm mero merv meve mexx mmmm mmor mmxv mmxx mobb mobe mobo moev moex mome momo moob mooe moor moov morb more moro move moxe moxo mrbb mrbm mreb mree mvee o-eo obbo ober obex oboe obor obox obre obro oeme oere oerm ombe ombo omee omeo omer omex omo- omoe omoo omor omov omox omre omro oobe ooer oome oooo oore orbb orbe orbo ore- oreb orem oreo orer orex orme ormo oro- oroe orom oror orro orve orvr ovee over ovo- ovoo ovre oxer oxo- oxox oxxo rbbb rbbr rbmx rebb rebe rebo reeb reem reev reme remo rere rero reve revo rexx rmmv rmvb rob- robb robe robo roer roev romb rome romm romo roob room roor roox rore roro rove rovo roxo rrrr rver v-me veer vemb veor ver- verb vere verm vero veve vevo vexx voer vome voom voor vor- vore vorm voro voxx vreo vver vvob vvvv vxvm xbee xbox xeer xeme xer- xero xexe xome xoom xoro xove xoxo xxxo xxxv xxxx