bbbb bbeb bbpr bebb bebe beeb beem beep beer beme bemu bere berm berr beru beur bmep breb bree brem brep brer brrm brrr brue brum brup bubb bube bubu buem buer bueu bum- bumb bump bur- burb bure burm burp burr buru ebbr eber ebru ebur eeee embe embr emer emeu emme emmu empe emre emup epbm epee eper eppp eprb eprp epub erbb erbe ereb erem erer erme erpe erre erub erum erur euer eur- eure mebe meem meep meer meme memr memu mepe mer- merb mere merm merp meru meum meup mmmm mmpr mmpu mmrp mppe mppp mprp mrbb mrbm mreb mree mube muee mume mumm mump mumu mure murr muru pbmr peep peer pepe per- pere perm perp perr peru peur pmbr pmmp pmmu pmpm pper pppp pprm ppru ppur pre- preb pree prem prep preu prrm prue prum pruu pu-e pube pubu puer pueu pume pump pupe pupu pur- purb pure purp purr puru rbbb rbbr rebb rebe rebu reeb reem reep reme remp repe repp repr repu rere reru reue reup reuu rmrp rrmp rrrr rrum rubb rube rubp rubu ruer rumb rume rumm rump rupe rupp rure rurp ruru u-rp ubbe uber umb- umbe umer umpe upbe upme uppe uppp uppu upup urbe ure- urre urum urup urur uuuu