a-be aaaa aaab aaae aaar aaba aabb aaea aaoe aaoo aara aare aaro abaa abab abae abar abb- abba abbb abbe abbo abbr abee aber abez aboa abob aboo abor abra abro abza aeer aer- aera aero aoba aora aorb arab arae arar arba arbe area aree areo aroa arob aroe aroo aror aroz arr- arra arre arro arrr arza arzo aza- azab azar azaz azer azo- azoo azor azra azza azzo baaa baar baaz baba babb babe babo babr baer baez bar- bara barb bare baro barr barz baza baze bazo bbbb bbeb bear beba bebb bebe bebo beeb beer beo- beor bera bere bero berr beze boab boar boaz boba bobb bobe bobo boea boee boeo boer boob booe boor booz bor- bora bore boro borr borz boza bozo brab brae brao braz brea breb bree breo brer brez broa brob broe broo bror broz brrr brza bzer bzoe bzzz eaba eara earb eare earo ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eera eero eeze eora eore eraz erba erbb erbe ereb erer erez erob eroe eroo erra erre erro ezer ezra ezzo o-eo oaer oara oare oaze obba obbo obea ober oboe obor obra obre obro oera oere ooaa ooba oobe ooer oooo oora oore ooze orab orae orao orar orba orbb orbe orbo ore- orea oreb oreo orer oro- oroe oror oroz orra orro orzo ozar ozee ozer raab raaz raba rabb rabe rabo raer raob rara rarb rare raro rarz raza raze razo razr razz rbbb rbbr rea- reae reao rear reba rebb rebe rebo reeb rera rere rero reza reze roab roar rob- roba robb robe robo roea roer roob roor rooz rora rore roro roza roze rozz rrrr rzab z-ro zaar zaba zabo zabr zaer zara zarb zare zaro zarr zaza zbar zber zeae zeba zebe zera zero zeze zoar zobo zoea zoo- zora zorb zore zoro zoza zozo zrze zzzz