a-ak a-ok aaaa aaab aaam aaba aabb aabm aaka aama aamb aamo aaoo abaa abab abak abam abax abb- abba abbb abbo abma abmb aboa abob abok aboo abox akaa akam akao akka akko akok akom amaa amam amax amb- amba ambo ambx amka amm- amma ammo amob amok amoo aoba aoma axo- axoa axxo ba-x baaa baak baam baba babb babm babo bak- baka bako bama bamb bamm bbbb bbox bmaa boab boak boba bobb bobo boka boko boma bomb boob book boom boox boxa kaaa kaab kaak kaam kaba kabb kabo kaka kakk kakm kako kakx kam- kama kamb kamm kamo kamx kaoa kaok kaox kaxa kbaa kbab kbak kbam kbba kbbb kbbk kbbm kbbo kbkb kbkk kbko kbmb kbmo kbmx kboa kbob kbok kboo kbox kbxb kbxx kkaa kkam kkba kkbb kkbo kkkk kkma kkmk kkmo kkmx kkoa kkob kkoo kkxa kkxk kkxx kmak kmam kmax kmbx kmkk kmko kmkx kmmk kmmm kmmo kmmx kmoa kmob kmok kmom kmox kmxa kmxb kmxk kmxm kmxo kmxx koab koak koba kobb kobk kobo koka kokb kokk koko kokx koma komb komo komx koob kook kooo kxaa kxam kxba kxbx kxkk kxkx kxma kxmb kxmx kxoa kxok kxoo kxox kxxk kxxm kxxo kxxx maaa maak maam maba mabo maka mako mama mamo maxx mbam mbba mbox mkak mmaa mmab mmmm mmxx moaa moab moam moba mobb mobo moka moko moma momo mooa moob mook moxa moxo oama obak obba obbo obkb obok obox okak okam okka okko okmo okok okom omak omam omao ombo omma omo- omoa omoo omox ooaa ooak ooba ooma oooo oxa- oxo- oxox oxxo xbox xmax xoka xoom xoxo xxxo xxxx