a-ak aaaa aaab aaar aaas aaba aabb aabt aaka aara aars aart aasa aass aast aata aatk aatt abaa abab abak abar abas abat abb- abba abbb abbr abbs abbt abra abrs abs- absa abss abta abts akaa akar akas akka akr- akra aksa akst arab arak arar aras arat arba arbs arka arks arr- arra arrk arrr arrs arrt ars- arsa arsk arst arta artr arts asaa asab asak asar asas asat asba aska askr asks askt asra asrs assa assk assr asss asst asta astb astr asts at-t ataa atab atak atar atas atat atbs atka atkt atra atrk atsb atst atta attr atts baaa baak baar baas baat baba babb babr babs bak- baka bakr baks bakt bar- bara barb bark barr bars bart basa bask bass bast bata bats batt bbas bbbb bbbs brab brak bras brat brka brkb brrr brrs brsb brsr brst bsaa bsas bsat bskt bsra bsts btaa btrt btss bttb kaaa kaab kaak kaar kaas kaat kaba kabb kabr kaka kakk kaks kakt kara karb kark karr kars kart kas- kasa kasb kask kasr kass kast kat- kata katb katk katr kats katt kbaa kbab kbak kbar kbas kbat kbba kbbb kbbk kbbr kbbs kbbt kbkb kbkk kbkr kbra kbrb kbrk kbrt kbsa kbsb kbsk kbsr kbss kbst kbta kbtb kbtk kbtr kbts kbtt kkaa kkar kkat kkba kkbb kkbr kkbs kkbt kkkk kkrb kkrk kkrr kkrs kkrt kksa kksr kkss kkst kktk kkts krab krak krar kras krat krba krbb krbk krbr krbt krka krkk krkr krks krrb krrk krrr krrs krrt krsa krsk krsr krss krst krta krtk krtr krts ksab ksak ksar ksas ksat ksba ksbr ksbs kska kskb kskk kskr ksks ksra ksrb ksrr ksrs ksrt kssa kssr ksss ksst ksta kstb kstk kstr ksts kstt ktaa ktak ktar ktas ktat ktba ktbb ktbr ktbt ktkb ktkk ktkr ktks ktkt ktrb ktrk ktrr ktrs ktrt ktsa ktsr ktst kttk kttr ktts kttt raab raak raas raat raba rabb rabk rabs raka rakk rakt rara rarb rark rars rasa rask rass rast rata ratk rats ratt rbbb rbbr rbbs rbss rbst rkss rkts rras rrat rrrr rsaa rssa rsts rtas rtss rtts saab saak saar saas saat saba sabb sabr sabs saka sakb sakk saks sara sark sarr sars sart sasa sask sass sast sata satb satr sats satt sbaa sbar sbas sbbs sbrk sbsa sbst sbtk skab skar skat skra skrt skss sras srta srtr ssaa ssab ssas ssat ssbr ssra ssrs sssa sssb ssss ssta sstb ssts stab stak star stas stat stbs stks stra strk strs stss sttr taa- taar taas taat taba tabb tabs taka takk taks takt tara tarb tark tarr tars tart tasa tasb task tasr tass tast tata tatb tatr tats tatt tbar tbas tbbs tbrb tbst tbta tkts traa trab trak tras trat trra trst trtr tsaa tsar tsat tsks tssa tssr tsst tsts ttab ttbb ttss tttt