aaaa aaab aaac aaam aaba aabb aabc aabm aabt aaca aacb aacc aacm aaco aact aama aamb aamc aamo aaoo aata aatc aatt abaa abab abac abam abat abb- abba abbb abbo abbt abca abcb abcc abct abma abmb abmc abmt aboa abob aboo abot abta ac-t acaa acab acac acat acba acca accc accm acco acct acma acmc acoa acom acot acta actc acto actt amaa amac amam amat amb- amba ambo amca amcc amco amm- amma ammo amob amoc amoo amot amta amtc amto aoba aoca aoma aotc at-t ataa atab atac atat atca atcc atco atm- atma atmo atob atoc atom atot atta atto baaa baam baat baba babb babm babo bac- baca bacc baco bact bama bamb bamc bamm bata batc bato batt bbbb bbcm bcaa bcam bcat bcbc bcca bccc bccm bcma bctc bmaa bmoc bmtc boab boac boat boba bobb bobo boca bocm boco boma bomb bomt boob booc boom boot bota botb boto bott btaa btcc btob bttb c-bo caaa caab caac caam caat caba cabo cac- caca cacc cacm caco cama camb camc camm camo camt cat- cata catb catc catm cato catt cbac cbat cbbc cbca cbcc cbcm cbct cbot cbta cbtc ccaa ccab ccac ccam ccat ccba ccbc ccca cccb cccc cccm ccma ccmb ccmc ccmm ccob ccoc ccom cctb cctc cctt cmaa cmac cmba cmbc cmcc cmmb cmmc cmoc cmot cmta cmtc coat coba cobb cobo coca coco coct com- coma comb comc comm como coob coom coot cota cotb cotc coto cott ctab ctba ctca ctma ctmo ctot ctta maaa maac maam maat maba mabo mac- maca macb macc maco mact mama mamc mamo maoc mata matc mato matt mbac mbam mbba mbca mbta mcaa mcac mcat mcba mcbc mcca mccc mcmc mcmt mcot mctc mmaa mmab mmac mmcc mmcm mmct mmmc mmmm moaa moab moac moam moat moba mobb mobo moca moco moma momo mooa moob mooc moot mota motb motm moto mott mtaa mtab mtac mtbc mtbo mtoa mtom oama obba obbo obot ocab ocac ocam ocat ocbc occa occc occt ocma ocom oct- octa octo omac omam omao ombo omca omma omo- omoa omoo ooaa ooba ooma oooo ootb otac otma oto- otoo otta otto t-mo taa- taat taba tabb tabc tabo taca tacc taco tact tama tamc tamm tamo taoa taom tata tatb tato tatt tbca tbcb tbcc tbta tcam tcca tccc tcom tctc tmaa tmac tmbc tmca tmcc tmcm tmtt toab toam toat toba tobo tobt toca toco toma tomb tomm tomo tomt tooa toom toot tota totc totm toto tott ttab ttbb ttma tttt