a-be aaaa aaab aaae aaam aaar aaba aabb aabm aaea aaem aama aamb aame aamo aamr aaoe aaoo aara aare aarm aaro abaa abab abae abam abar abb- abba abbb abbe abbo abbr abee aber abma abmb aboa abob aboo abor abra abro aeer aeom aer- aera aero amaa amae amam amar amb- amba ambe ambo ambr amee amer amm- amma amme ammo amob amoo amor amra amro aoba aoma aora aorb arab arae aram arar arba arbe area aree arem areo arma arme armm armo aroa arob aroe arom aroo aror arr- arra arre arro arrr baaa baam baar baba babb babe babm babo babr baer bama bamb bame bamm bar- bara barb bare barm baro barr bbbb bbeb beam bear beba bebb bebe bebo beeb beem beer bema beme beo- beor bera bere berm bero berr bmaa boab boar boba bobb bobe bobo boea boee boeo boer boma bomb bome boob booe boom boor bor- bora bore borm boro borr brab brae bram brao brea breb bree brem breo brer broa brob broe brom broo bror brrm brrr eaba eama eame eaom eara earb eare earo ebam ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eemo eera eero emae emam emar emba embe embo embr emer emma emme emor emra emre eora eore eram erba erbb erbe ereb erem erer erma erme ermo erob eroe eroo erra erre erro maaa maam maar maba mabe mabo maee maem maeo maer mama mame mamo maor mar- mara mare marm maro marr mbam mbba mear mebe mebo meem meer mema meme memo memr meor mer- mera merb mere merm mero mmaa mmab mmar mmea mmmm mmor moaa moab moam moar moba mobb mobe mobo moea moma mome momo mooa moob mooe moor mora morb more moro mrbb mrbm mreb mree o-eo oaer oama oara oare obba obbo obea ober oboe obor obra obre obro oeme oera oere oerm omam omao omar ombe ombo omee omeo omer omma omo- omoa omoe omoo omor omra omre omro ooaa ooba oobe ooer ooma oome oooo oora oore orab orae oram orao orar orba orbb orbe orbo ore- orea oreb orem oreo orer orma orme ormo oro- oroe orom oror orra orro raab raam raba rabb rabe rabo raer rama ramb rame ramm ramo raob raom rara rarb rare raro rbbb rbbr rea- reae ream reao rear reba rebb rebe rebo reeb reem rema reme remo rera rere rero roab roam roar rob- roba robb robe robo roea roer roma romb rome romm romo roob room roor rora rore roro rrrr