a-ak aaaa aaab aaad aaar aaav aaba aabb aabd aada aaka aara aard aava abaa abab abad abak abar abb- abba abbb abbr abda abra abva abvd adaa adab adad adak adar adba adda addd addr adra advb akaa akar akka akr- akra arab arad arak arar arba arda arka arr- arra arrk arrr arva avab avar avda avra avva baaa baad baak baar baba babb babr bada badb badd badr bak- baka bakr bar- bara barb bard bark barr bava bbad bbbb bbdd bd-r bdav brab brad brak brav brda brka brkb brrr daab daad daar daba dabb dada daka dara darb dard dark darr dava dbar dddd dkba draa drab drad drak drar drba drda drra dvar dvda dvdr dvra kaaa kaab kaak kaar kaba kabb kabd kabr kad- kada kadd kadr kadv kaka kakk kara karb kard kark karr karv kava kavb kavv kbaa kbab kbad kbak kbar kbba kbbb kbbd kbbk kbbr kbdb kbdr kbdv kbkb kbkk kbkr kbkv kbra kbrb kbrd kbrk kbrv kbva kbvb kbvr kdaa kdab kdad kdak kdar kdav kdbb kdbr kdbv kddb kddd kddk kddr kdka kdkb kdkd kdkk kdkr kdrb kdrv kdva kdvb kdvr kdvv kkaa kkar kkba kkbb kkbd kkbr kkda kkdd kkdv kkkk kkrb kkrk kkrr kkrv kkvr kkvv krab krad krak krar krav krba krbb krbd krbk krbr krda krdd krdr krka krkd krkk krkr krkv krrb krrk krrr krva krvb krvk krvr krvv kvab kvak kvar kvbr kvda kvra kvrr kvrv kvvr kvvv raab raad raak raba rabb rabk rada radd radr raka rakk rara rarb rark rava rbbb rbbr rrad rrrr vaad vaar vada vaka vara vard vark varr vava vrak vrav vrba vvvv