a-ak a-ok aaaa aaab aaal aaav aaba aabb aabl aaka aala aall aalo aaoo aava abaa abab abak abal abb- abba abbb abbo abla ablo ablv aboa abob abok abol aboo abov abva akaa akal akao akka akko aklo akok alaa alak alal alao alb- alba albo alk- alka alkb alko all- alla alll allo aloa alok alol aloo alov alva alvo aoba aola avab aval avao avlb avva avvo baaa baak baal baba babb babo bak- baka bakl bako bala balk ball balo baol bava bbbb bblb blaa blab blak blkb blob blok bloo boab boak boal boba bobb bobo boka boko bola bolk boll bolo boob book bool bova bovo k-lo kaaa kaab kaak kaal kaba kabb kabo kaka kakk kako kala kalb kalk kall kalo kalv kaoa kaok kaol kava kavb kavl kavo kavv kbaa kbab kbak kbal kbba kbbb kbbk kbbl kbbo kbkb kbkk kbkl kbko kbkv kbla kblb kbll kblo kblv kboa kbob kbok kboo kbov kbva kbvb kbvo kkaa kkal kkba kkbb kkbl kkbo kkkk kklb kkll kklo kklv kkoa kkob kkol kkoo kkov kkvv klaa klab klak klal klav klbb klbl klka klkk klkl klko klkv klla kllb kllk kllv kloa klob klok klol kloo klov klvb klvk klvl klvo klvv koab koak koal koba kobb kobk kobo koka kokb kokk koko kola kolb kolk koll kolo kolv koob kook kool kooo koov kova kovk kovo kvab kvak kval kvbl kvkl kvlb kvlo kvlv kvoa kvob kvok kvol kvoo kvov kvvl kvvv laaa laak laal laba labo laka lala lall lalo lava lavo lkab lkal llao llll lloa lloo lo-v lob- loba lobb lobo loka lokk loko lola loll lolo loob look lool lovo lvov oall obak obal obba obbo obkb obla obok obol okak okka okko okla oklo okok okol olav olba olbo olka olla ollo olov ooaa ooak ooba oola oolo oooo oval ovo- ovol ovoo vaal vaka vala valk vall valo vava vlab vlba vlok voka vola volk voll volo vool vovk vvob vvvv