a-ak aaaa aaab aaad aaar aaba aabb aabd aada aaka aara aard abaa abab abad abak abar abb- abba abbb abbr abda abra adaa adab adad adak adar adba adda addd addr adra akaa akar akka akr- akra arab arad arak arar arba arda arka arr- arra arrk arrr baaa baad baak baar baba babb babr bada badb badd badr bak- baka bakr bar- bara barb bard bark barr bbad bbbb bbdd bd-r brab brad brak brda brka brkb brrr daab daad daar daba dabb dada daka dara darb dard dark darr dbar dddd dkba draa drab drad drak drar drba drda drra kaaa kaab kaak kaar kaba kabb kabd kabr kad- kada kadd kadr kaka kakk kara karb kard kark karr kbaa kbab kbad kbak kbar kbba kbbb kbbd kbbk kbbr kbdb kbdr kbkb kbkk kbkr kbra kbrb kbrd kbrk kdaa kdab kdad kdak kdar kdbb kdbr kddb kddd kddk kddr kdka kdkb kdkd kdkk kdkr kdrb kkaa kkar kkba kkbb kkbd kkbr kkda kkdd kkkk kkrb kkrk kkrr krab krad krak krar krba krbb krbd krbk krbr krda krdd krdr krka krkd krkk krkr krrb krrk krrr raab raad raak raba rabb rabk rada radd radr raka rakk rara rarb rark rbbb rbbr rrad rrrr