a-be aaaa aaab aaae aaam aaar aaba aabb aabm aaea aaem aama aamb aame aamr aara aare aarm aaru abaa abab abae abam abar abau abb- abba abbb abbe abbr abee aber abma abmb abra abua abue abum aeer aer- aera amaa amae amam amar amb- amba ambe ambr ambu amee amer ameu amm- amma amme ammu amra amua amum amur arab arae aram arar arau arba arbe area aree arem areu arma arme armm armu arr- arra arre arrr arru arua arub arue arum auaa aube auer auma aur- aura aure baaa baam baar baba babb babe babm babr babu baer bama bamb bame bamm bamu bar- bara barb bare barm barr baru bau- baum baur bbau bbbb bbeb beam bear beau beba bebb bebe beeb beem beer bema beme bemu bera bere berm berr beru beur bmaa brab brae bram brau brea breb bree brem brer brrm brrr brue brum buar buba bubb bube bubu buea buem buer bueu bum- buma bumb bur- bura burb bure burm burr buru eaba eama eame eara earb eare ebam ebba ebbr eber ebru ebur eeea eeee eera emae emam emar emba embe embr emer emeu emma emme emmu emra emre eram erau erba erbb erbe ereb erem erer erma erme erra erre erua erub erum erur euba euer eur- eura eure maaa maam maar maba mabe mabu maee maem maer mama mame mamu mar- mara mare marm marr maru maua maum maur mbam mbba mear mebe meem meer mema meme memr memu mer- mera merb mere merm meru meum mmaa mmab mmar mmea mmmm mrbb mrbm mreb mree muar mube muee muma mume mumm mumu mura mure murr muru raab raam raba rabb rabe rabu raer rama ramb rame ramm ramu rara rarb rare raua raub raue raum rbbb rbbr rea- reae ream rear reau reba rebb rebe rebu reeb reem rema reme rera rere reru reue reuu rrrr rrum ruba rubb rube rubu ruer ruma rumb rume rumm rura rure ruru uaru uaua ubar ubba ubbe uber ubra ueba umaa umar umb- umba umbe umer umma umra urau urba urbe ure- urea urma urra urre urum urur uuuu