a-be aaaa aaab aaae aaar aaba aabb aaea aara aare aaru abaa abab abae abaj abar abau abb- abba abbb abbe abbr abee aber abra abua abue aeer aer- aera ajab ajar ajba ajee ajur arab arae arar arau arba arbe area aree areu arja arje arju arr- arra arre arrr arru arua arub arue auaa aube auer auja aur- aura aure baaa baar baba babb babe babr babu baer baja baju bar- bara barb bare barr baru bau- baur bbau bbbb bbeb bear beau beba bebb bebe beeb beej beer beja bera bere berr beru beur brab brae braj brau brea breb bree brer brje brrr brue buar buba bubb bube bubu buea buer bueu buja buje buju bur- bura burb bure burj burr buru eaba eara earb eare ebba ebbr eber ebru ebur eeea eeee eera ejer erau erba erbb erbe ereb erer erja erra erre erua erub erur euba euer eur- eura eure jaar jaba jabr jaer jaja jaju jara jare jarr jaru jaur jbaa jbar jear jebb jebe jeer jeju jera jere jeru jeur jjar jrbr juab juar juba jube jubu juja juju jura jure jurr raab raaj raba rabb rabe rabu raer raja raje raju rara rarb rare raua raub raue rbbb rbbr rea- reae rear reau reba rebb rebe rebu reeb reja rera rere reru reue reuu rrrr ruba rubb rube rubu ruer ruja rura rure ruru uaru uaua ubar ubba ubbe uber ubja ubra ueba urau urba urbe ure- urea urra urre urur uuuu