a-ak aaaa aaab aaar aaav aaba aabb aaka aara aava abaa abab abak abar abb- abba abbb abbr abra abva akaa akar akka akr- akra arab arak arar arba arka arr- arra arrk arrr arva avab avar avra avva baaa baak baar baba babb babr bak- baka bakr bar- bara barb bark barr bava bbbb brab brak brav brka brkb brrr kaaa kaab kaak kaar kaba kabb kabr kaka kakk kara karb kark karr karv kava kavb kavv kbaa kbab kbak kbar kbba kbbb kbbk kbbr kbkb kbkk kbkr kbkv kbra kbrb kbrk kbrv kbva kbvb kbvr kkaa kkar kkba kkbb kkbr kkkk kkrb kkrk kkrr kkrv kkvr kkvv krab krak krar krav krba krbb krbk krbr krka krkk krkr krkv krrb krrk krrr krva krvb krvk krvr krvv kvab kvak kvar kvbr kvra kvrr kvrv kvvr kvvv raab raak raba rabb rabk raka rakk rara rarb rark rava rbbb rbbr rrrr vaar vaka vara vark varr vava vrak vrav vrba vvvv