a-ak aaaa aaab aaar aaas aaba aabb aaka aaku aara aars aaru aasa aass aasu aaus abaa abab abak abar abas abau abb- abba abbb abbr abbs abra abrs abs- absa abss absu abua abuk abus akaa akar akas akka akku akr- akra aksa aksu akua arab arak arar aras arau arba arbs arka arks arr- arra arrk arrr arrs arru ars- arsa arsk arsu arua arub asaa asab asak asar asas asau asba asbu aska askr asks asra asrs asru assa assk assr asss assu asub asur asus auaa auks aur- aura ausa ausu baaa baak baar baas baba babb babr babs babu bak- baka bakr baks baku bar- bara barb bark barr bars baru basa bask bass basu bau- bauk baur bbas bbau bbbb bbbs brab brak bras brau brka brkb brrr brrs brsb brsr brus bsaa bsas bsra buar buba bubb bubs bubu buka bukk buku bur- bura burb burk burr burs buru busa busk buss busu buus kaaa kaab kaak kaar kaas kaba kabb kabr kabu kaka kakk kaks kaku kara karb kark karr kars karu kas- kasa kasb kask kasr kass kasu kau- kaub kauk kaur kaus kbaa kbab kbak kbar kbas kbba kbbb kbbk kbbr kbbs kbbu kbkb kbkk kbkr kbra kbrb kbrk kbru kbsa kbsb kbsk kbsr kbss kbsu kbua kbub kbuk kbur kbus kbuu kkaa kkar kkba kkbb kkbr kkbs kkkk kkrb kkrk kkrr kkrs kksa kksr kkss kksu kkua kkus kkuu krab krak krar kras krba krbb krbk krbr krka krkk krkr krks krku krrb krrk krrr krrs krsa krsk krsr krss krsu krua kruk krur ksab ksak ksar ksas ksau ksba ksbr ksbs kska kskb kskk kskr ksks ksku ksra ksrb ksrr ksrs kssa kssr ksss kssu ksua ksub ksuu kuar kuau kuba kubb kubr kubs kubu kuka kukk kuks kuku kura kurb kurk kurr kurs kuru kusa kusb kusu kuub kuuk kuur kuuu raab raak raas raba rabb rabk rabs rabu raka rakk raku rara rarb rark rars rasa rask rass rasu raua raub rauk raus rbbb rbbr rbbs rbss rkss rras rrrr rsaa rssa rsua ruas ruba rubb rubs rubu ruka rukk ruku rura rurs ruru rusa rusk russ rusu saab saak saar saas saba sabb sabr sabs sabu saka sakb sakk saks saku sara sark sarr sars saru sasa sask sass saua sauk saur saus sbaa sbar sbas sbbs sbrk sbsa sbus skab skar skra skss skua skur sras srub ssaa ssab ssas ssau ssbr ssra ssrs sssa sssb ssss suar suas sub- suba subb subs suka suks suku sur- sura surr surs suru sus- susa susk suss susu suus uars uaru uasa uaua ubar ubba ubra ukba ukra uksa ukur uras urau urba urbs urka urra ursa urss ursu uruk urur urus us-a us-k usaa usak usar usas usba usbr usbs uska usra ussa ussb ussr usss ussu usua usus uuuu