a-be aaaa aaab aaae aaaf aaam aaar aaba aabb aabm aaea aaem aafa aafb aaff aama aamb aame aamo aamr aaoe aaoo aara aare aarm aaro abaa abab abae abaf abam abar abb- abba abbb abbe abbo abbr abee aber abff abma abmb aboa abob abof aboo abor abra abro aeaf aeer aeom aer- aera aero afaa afam afao afar afee afer affa affo afma afoa afoe afoo afor afr- afra afre afrm afro amaa amae amam amar amb- amba ambe ambo ambr amee amer amfm amfr amm- amma amme ammo amob amof amoo amor amra amro aoba aoma aora aorb arab arae araf aram arar arba arbe area aree aref arem areo arfa arfb arff arma arme armm armo aroa arob aroe arom aroo aror arr- arra arre arro arrr baaa baaf baam baar baba babb babe babm babo babr baer baff bafo bama bamb bame bamf bamm bar- bara barb bare barf barm baro barr bbbb bbeb beaf beam bear beba bebb bebe bebo beeb beef beem beer befa befe beff befo bema beme beo- beof beor bera bere berm bero berr bfme bmaa boab boar boba bobb bobe bobo boea boee boef boeo boer bofa bofe boff boma bomb bome boob booe boof boom boor bor- bora bore borf borm boro borr brab brae braf bram brao brea breb bree bref brem breo brer brfm broa brob broe brom broo bror brrm brrr eaaf eaba eafb eama eame eaom eara earb eare earo ebam ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eefa eefe eemo eera eero efab efbr efeo effa efma efor emae emam emar emba embe embo embr emer emma emme emor emra emre eora eore eraf eram erba erbb erbe ereb erem erer erma erme ermo erob eroe eroo erra erre erro faaa faam faba fabe fabm fabo faeb faem fafa fafe faff fafo fama fame famo fara farb fare farm faro farr fbar fbom feaf feam fear feba febo feeb feem feer fefe feff fefo fema femb feme femm feof fera ferb fere ferm fero ferr ffar ffee ffff ffrr fmea foaf foam foar foba foer fofo foma fome fomo foof foom for- fora forb fore form foro forr frab frae fram frea free frem freo frob froe from maaa maaf maam maar maba mabe mabo maee maem maeo maer mafa mafb maff mama mame mamf mamo maor mar- mara mare marf marm maro marr mbam mbba mear mebe mebo meef meem meer mefe meff mefo mema meme memo memr meor mer- mera merb mere merf merm mero mfbm mffa mfor mmaa mmab mmar mmea mmff mmmm mmor mmrf moaa moab moaf moam moar moba mobb mobe mobo moea moef mofa mofe moff mofo moma mome momo mooa moob mooe moor mora morb more morf moro mrbb mrbm mreb mree o-eo oaer oafo oama oara oare obba obbo obea ober oboe obor obra obre obro oeme oera oere oerm ofem ofer off- offa offe offo offr ofme ofor ofra ofre omam omao omar ombe ombo omee omeo omer omma omo- omoa omoe omoo omor omra omre omro ooaa ooba oobe ooer ooff ooma oome oooo oora oore orab orae oram orao orar orba orbb orbe orbo ore- orea oreb orem oreo orer orfe orff orma orme ormo oro- oroe orof orom oror orra orro raab raaf raam raba rabb rabe rabo raef raer rafa rafe raff rama ramb rame ramm ramo raob raom rara rarb rare rarf raro rbaf rbbb rbbr rea- reae reaf ream reao rear reba rebb rebe rebo reeb reef reem refe reff refr rema reme remo reof rera rere rero rfae rfam rfef rfem rmaf roab roaf roam roar rob- roba robb robe robo roea roer rofe roff rofo roma romb rome romm romo roob roof room roor rora rore roro rrrr