bbbb bbeb bebb bebe beeb beem beer behm behr beme bemu bere berm berr beru beur bher bhur bhuu breb bree brem brer brrm brrr brue bruh brum bubb bube bubu buem buer bueu buhe buhr bum- bumb bur- burb bure burh burm burr buru ebbr eber ebru ebur eeee eheh eher eheu ehre embe embr emer emeu emme emmu emre erbb erbe ereb erem erer erhu erme erre erub eruh erum erur euer eur- eure hebb hebe hebr heeb heem heer hehe hem- heme hemu herb here herm herr heru heue heur hhhh hmhb hmmm hree hubb hube huer huhu hume humh humm hure hurr huru huub mebe meem meer mehe mehr mehu meme memr memu mer- merb mere merm meru meum mhem mhmm mhmr mmhm mmmh mmmm mrbb mrbm mreb mree mube muee muhr muhu mume mumm mumu mure murr muru rbbb rbbr rebb rebe rebu reeb reem rehb rehe rehm reme rere reru reue reuu rheb rhee rhem rhue rhum rrrr rrum rubb rube rubu ruer ruhe ruhh ruhm ruhr rumb rume rumm rure ruru ubbe uber uher uhuh umb- umbe umer urbe ure- ureh urre urrh urum urur uuuu