bbbb bbeb bebb bebe bebo beeb beef beem beer befe beff befo beme beo- beof beor bere berm bero berr bevo bfme bobb bobe bobo boee boef boeo boer bofe boff bomb bome boob booe boof boom boor bor- bore borf borm boro borr bove bovo breb bree bref brem breo brer brev brfm brob broe brom broo bror brrm brrr brvm ebbo ebbr eber eboe eboo ebor ebro eeee eefe eemo eero efbr efeo efor embe embo embr emer emme emor emre eore erbb erbe ereb erem erer erev erme ermo erob eroe eroo erre erro erve ever evoe evoo evre fbom febo feeb feem feer fefe feff fefo femb feme femm feof ferb fere ferm fero ferr ferv feve fevr ffee ffff ffrr foer fofo fome fomo foof foom for- forb fore form foro forr fove fr-v free frem freo frob froe from mebe mebo meef meem meer mefe meff mefo mefv meme memo memr meor mer- merb mere merf merm mero merv meve mfbm mfor mmff mmmm mmor mmrf mobb mobe mobo moef moev mofe moff mofo mome momo moob mooe moor moov morb more morf moro move mrbb mrbm mreb mree mvee o-eo obbo ober obfv oboe obor obre obro oeme oere oerm ofem ofer off- offe offo offr ofme ofor ofre ombe ombo omee omeo omer omo- omoe omoo omor omov omre omro oobe ooer ooff oome oooo oore orbb orbe orbo ore- oreb orem oreo orer orfe orff orme ormo oro- oroe orof orom oror orro orve orvr ovee over ovo- ovoo ovre rbbb rbbr rebb rebe rebo reeb reef reem reev refe reff refr reme remo reof rere rero reve revo rfef rfem rmmv rmvb rob- robb robe robo roer roev rofe roff rofo romb rome romm romo roob roof room roor rore roro rove rovo rrrr rver v-me veer vemb veor ver- verb vere verm vero veve vevo vfor voer voff vofr vome voom voor vor- vore vorm voro vref vreo vver vvob vvvv