a-ak a-ok aaaa aaab aaam aaba aabb aabm aaka aama aamb aamo aaoo abaa abab abak abam abb- abba abbb abbo abma abmb aboa abob abok aboo akaa akam akao akka akko akok akom amaa amam amb- amba ambo amka amm- amma ammo amob amok amoo aoba aoma baaa baak baam baba babb babm babo bak- baka bako bama bamb bamm bbbb bmaa boab boak boba bobb bobo boka boko boma bomb boob book boom kaaa kaab kaak kaam kaba kabb kabo kaka kakk kakm kako kam- kama kamb kamm kamo kaoa kaok kbaa kbab kbak kbam kbba kbbb kbbk kbbm kbbo kbkb kbkk kbko kbmb kbmo kboa kbob kbok kboo kkaa kkam kkba kkbb kkbo kkkk kkma kkmk kkmo kkoa kkob kkoo kmak kmam kmkk kmko kmmk kmmm kmmo kmoa kmob kmok kmom koab koak koba kobb kobk kobo koka kokb kokk koko koma komb komo koob kook kooo maaa maak maam maba mabo maka mako mama mamo mbam mbba mkak mmaa mmab mmmm moaa moab moam moba mobb mobo moka moko moma momo mooa moob mook oama obak obba obbo obkb obok okak okam okka okko okmo okok okom omak omam omao ombo omma omo- omoa omoo ooaa ooak ooba ooma oooo