aaaa aaab aaac aaar aaba aabb aabc aabt aaca aacb aacc aacr aact aacu aara aarc aart aaru aata aatc aatt abaa abab abac abar abat abau abb- abba abbb abbr abbt abca abcb abcc abcr abct abra abrc abta abtu abua abut abza abzu ac-t acaa acab acac acar acat acba acca accc acct accu acr- acra acrc acrr acta actc actt actu acu- acur acut arab arac arar arat arau arba arc- arca arct arr- arra arrc arrr arrt arru arta artc artr artz arua arub arut arza arzu at-t ataa atab atac atar atat atca atcc atcr atra atrc atru atta attr attu atua atub atuc atur auaa auca auct aur- aura aut- aza- azab azar azat azaz azca azra azua azur azza baaa baar baat baaz baba babb babr babu bac- baca bacc bact bacz bar- bara barb barc barr bart baru barz bata batc batt batu batz bau- baur baza bbau bbbb bbrc bcaa bcar bcat bcbc bcca bccc bcra bcru bctc bcuc brab brac brat brau braz brca brcb brrr brtc bruc brut bruz brza btaa btcc btrc btrt bttb buar buat buba bubb bubu buca bucc bucu bucz bur- bura burb burr burt buru burz but- buta butt butz buuz buza buzz bzzt bzzz caaa caab caac caat caba cabu cac- caca cacc cacr cara carb carc carr cart cat- cata catb catc catt catu catz cauc caut caza cbac cbar cbat cbbc cbca cbcc cbcr cbct cbcu cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccu ccra ccrc ccrt cctb cctc cctt ccuc ccut crab crac crar crat crau crbc crbu crca crcc crcr crcz crrt crtc crub crut cruz ctab ctba ctca ctrc ctta cuau cub- cuba cubb cuca cucc cura curb curr curt cut- cuta cutc cutt czar raab raat raaz raba rabb rabu rac- raca racc ract racu rara rarb rarz rata ratt ratu ratz raua raub rauc raut raza razr razz rbbb rbbr rcac rcbc rccb rccc rctc rrat rrrr rtca rtcc ruba rubb rubu ruca ruct rura rurc ruru ruta rutt rutu ruza rzab taa- taar taat taba tabb tabc tabu taca tacc tact tara tarb tarc tarr tart taru tata tatb tatr tatt tatu tatz taua taub tauc taur taut taza tazr tazz tbar tbca tbcb tbcc tbrb tbta tcca tccc tccu tctc traa trab trac trat trau traz trca trcc trra trtc trtr trub truc trut truu ttab ttbb tttt tuar tuat tuba tubb tubr tubu tuca tucc tura turb turc turr turt turu tuta tutt tutu tuza tuzu tuzz tzar tzur tzut tzzt uabc uaca uarc uart uaru uata uatu uaua ubac ubar ubba ubra ucar ucat ucbc ucca ucrc ucua ucut urac urat urau urba urca urra urur urut uruz urza utac utau uttu uuta uuuu zaar zaat zaba zabr zabu zaca zara zarb zarr zaru zaur zaza zazu zbar zcar zcta zctu zubr zubu zura zurb zurr zuru zuta zuzu zzzz