aaaa aaab aaam aaar aaba aabb aabm aabt aama aamb aamo aamr aaoo aara aarm aaro aart aata aatt abaa abab abam abar abat abb- abba abbb abbo abbr abbt abma abmb abmt aboa abob aboo abor abot abra abro abta amaa amam amar amat amb- amba ambo ambr amm- amma ammo amob amoo amor amot amra amro amta amto aoba aoma aora aorb aort arab aram arar arat arba arma armm armo armt aroa arob arom aroo aror arr- arra arro arrr arrt arta arto artr at-t ataa atab atar atat atm- atma atmo atob atom ator atot atra atrm atro atta atto attr baaa baam baar baat baba babb babm babo babr bama bamb bamm bar- bara barb barm baro barr bart bata bato batt bbbb bmaa boab boar boat boba bobb bobo boma bomb bomt boob boom boor boot bor- bora borm boro borr bort bota botb boto bott brab bram brao brat broa brob brom broo bror brot brrm brrr btaa btob btor btrt bttb maaa maam maar maat maba mabo mama mamo maor mar- mara marm maro marr mart mata mato matr matt mbam mbba mbta mmaa mmab mmar mmmm mmor moaa moab moam moar moat moba mobb mobo moma momo mooa moob moor moot mora morb moro mort mota motb motm moto mott mrbb mrbm mrta mrtm mrtt mtaa mtab mtbo mtoa mtom mtor mtrr mttr oama oara obba obbo obor obot obra obro omam omao omar ombo omma omo- omoa omoo omor omra omro ooaa ooba ooma oooo oora oort ootb orab oram orao orar orat orba orbb orbo orma ormo oro- orom oror orot orra orro orta orto otar otma oto- otoo otor otra otro otta otto raab raam raat raba rabb rabo rama ramb ramm ramo raob raom rara rarb raro rata rato ratt rbbb rbbr roab roam roar roat rob- roba robb robo robt roma romb romm romo roob room roor root rora roro rort rota roto rotr rott rrat rrrr t-mo taa- taar taat taba tabb tabo tama tamm tamo taoa taom taor tara tarb tarm taro tarr tart tata tatb tato tatr tatt tbar tbrb tbta tmaa tmbr tmro tmtt toab toam toat toba tobo tobt toma tomb tomm tomo tomt tooa toom toor toot tora torm toro torr tort tota totm toto totr tott traa trab tram trao trat trma trmb troa trom troo trot trra trtr ttab ttbb ttma tttt