a-ak aaaa aaab aaaf aaal aaba aabb aabl aafa aafb aaff aafl aaka aala aall abaa abab abaf abak abal abb- abba abbb abff abla afaa afak affa afka afla akaa akal akka alaa alak alal alb- alba alfa alk- alka alkb all- alla alll baaa baaf baak baal baba babb baff bak- baka bakl bala balf balk ball bbbb bblb bffl blaa blab blak blkb f--k faaa faba fafa faff fala falk fall fbla ffff fkab flab flak kaaa kaab kaaf kaak kaal kaba kabb kabf kafa kaff kaka kakk kala kalb kalf kalk kall kbaa kbab kbak kbal kbba kbbb kbbf kbbk kbbl kbfb kbff kbfk kbfl kbkb kbkf kbkk kbkl kbla kblb kblf kbll kfab kfal kfbk kffa kffb kfff kffk kfka kfkb kfla kflb kflf kfll kkaa kkal kkba kkbb kkbl kkkk kklb kklf kkll klaa klab klaf klak klal klbb klbf klbl klfa klff klka klkk klkl klla kllb kllk laaa laak laal laba lafb laff laka lala lall lkab lkal llll