a-ak aaaa aaab aaar aaba aabb aaka aaku aara aaru abaa abab abak abar abau abb- abba abbb abbr abra abua abuk akaa akar akka akku akr- akra akua arab arak arar arau arba arka arr- arra arrk arrr arru arua arub auaa aur- aura baaa baak baar baba babb babr babu bak- baka bakr baku bar- bara barb bark barr baru bau- bauk baur bbau bbbb brab brak brau brka brkb brrr buar buba bubb bubu buka bukk buku bur- bura burb burk burr buru kaaa kaab kaak kaar kaba kabb kabr kabu kaka kakk kaku kara karb kark karr karu kau- kaub kauk kaur kbaa kbab kbak kbar kbba kbbb kbbk kbbr kbbu kbkb kbkk kbkr kbra kbrb kbrk kbru kbua kbub kbuk kbur kbuu kkaa kkar kkba kkbb kkbr kkkk kkrb kkrk kkrr kkua kkuu krab krak krar krba krbb krbk krbr krka krkk krkr krku krrb krrk krrr krua kruk krur kuar kuau kuba kubb kubr kubu kuka kukk kuku kura kurb kurk kurr kuru kuub kuuk kuur kuuu raab raak raba rabb rabk rabu raka rakk raku rara rarb rark raua raub rauk rbbb rbbr rrrr ruba rubb rubu ruka rukk ruku rura ruru uaru uaua ubar ubba ubra ukba ukra ukur urau urba urka urra uruk urur uuuu