a-ak aaaa aaab aaal aaba aabb aabl aaka aala aall abaa abab abak abal abb- abba abbb abla akaa akal akka alaa alak alal alb- alba alk- alka alkb all- alla alll baaa baak baal baba babb bak- baka bakl bala balk ball bbbb bblb blaa blab blak blkb kaaa kaab kaak kaal kaba kabb kaka kakk kala kalb kalk kall kbaa kbab kbak kbal kbba kbbb kbbk kbbl kbkb kbkk kbkl kbla kblb kbll kkaa kkal kkba kkbb kkbl kkkk kklb kkll klaa klab klak klal klbb klbl klka klkk klkl klla kllb kllk laaa laak laal laba laka lala lall lkab lkal llll