a-ak aaaa aaab aaal aaav aaba aabb aabl aaka aala aall aava abaa abab abak abal abb- abba abbb abla ablv abva akaa akal akka alaa alak alal alb- alba alk- alka alkb all- alla alll alva avab aval avlb avva baaa baak baal baba babb bak- baka bakl bala balk ball bava bbbb bblb blaa blab blak blkb kaaa kaab kaak kaal kaba kabb kaka kakk kala kalb kalk kall kalv kava kavb kavl kavv kbaa kbab kbak kbal kbba kbbb kbbk kbbl kbkb kbkk kbkl kbkv kbla kblb kbll kblv kbva kbvb kkaa kkal kkba kkbb kkbl kkkk kklb kkll kklv kkvv klaa klab klak klal klav klbb klbl klka klkk klkl klkv klla kllb kllk kllv klvb klvk klvl klvv kvab kvak kval kvbl kvkl kvlb kvlv kvvl kvvv laaa laak laal laba laka lala lall lava lkab lkal llll vaal vaka vala valk vall vava vlab vlba vvvv