a-be aaaa aaab aaae aaar aaba aabb aaea aara aare aaru abaa abab abae abar abau abb- abba abbb abbe abbr abee aber abez abra abua abue abza abzu aeer aer- aera arab arae arar arau arba arbe area aree areu arr- arra arre arrr arru arua arub arue arza arzu auaa aube auer aur- aura aure aza- azab azar azaz azer azra azua azur azza baaa baar baaz baba babb babe babr babu baer baez bar- bara barb bare barr baru barz bau- baur baza baze bbau bbbb bbeb bear beau beba bebb bebe beeb beer bera bere berr beru beur beze bezu brab brae brau braz brea breb bree brer brez brrr brue bruz brza buar buba bubb bube bubu buea buer bueu bur- bura burb bure burr buru burz buuz buza buze buzz bzer bzzz eaba eara earb eare ebba ebbr eber ebru ebur eeea eeee eera eeze erau eraz erba erbb erbe ereb erer erez erra erre erua erub erur euba euer eur- eura eure ezer ezra ezuz raab raaz raba rabb rabe rabu raer rara rarb rare rarz raua raub raue raza raze razr razz rbbb rbbr rea- reae rear reau reba rebb rebe rebu reeb rera rere reru reue reuu reza reze rezu rrrr ruba rubb rube rubu ruer ruez rura rure ruru ruza ruze rzab uaru uaua ubar ubba ubbe uber ubra ueba urau urba urbe ure- urea urra urre urur uruz urza uuuu uzeb uzer zaar zaba zabr zabu zaer zara zarb zare zarr zaru zaur zaza zazu zbar zber zeae zeba zebe zebu zera zeze zrze zubr zubu zura zurb zurr zuru zuzu zzzz