a-ak a-do a-ok aaaa aaab aaad aaba aabb aabd aada aaka aaoo abaa abab abad abaj abak abb- abba abbb abbo abda abdo aboa abob abod abok aboo adaa adab adad adak adao adba adda addd addo adja adob adod adok adoo ajab ajak ajao ajba ajka ajob ajoo akaa akao akka akko akok aoba baaa baad baak baba babb babo bada badb badd bado baja bak- baka bako bbad bbbb bbdd bbdo bd-j bjoa boab boad boak boba bobb bobo boda bodb bodo bojd bojo boka boko boob bood book d-bo daab daad daba dabb dabo dada dado daja daka dako dddd djao dkba doab doak doba dobb dod- doda dodd dodo doja dojo doka doko doob dood dook jaak jaba jabo jada jado jaja jaka jako jbaa jbob jjad joab joad joao joba jobo joda jodo jojo joka jokb jook kaaa kaab kaak kaba kabb kabd kabo kad- kada kadd kado kaja kajb kajk kajo kaka kakj kakk kako kaoa kaok kbaa kbab kbad kbak kbba kbbb kbbd kbbk kbbo kbdb kbdo kbja kbjd kbjk kbkb kbkk kbko kboa kbob kbod kbok kboo kdaa kdab kdad kdak kdao kdbb kddb kddd kddk kdka kdkb kdkd kdkk kdko kdok kjaa kjak kjbb kjjd kjjj kjjk kjjo kjkj kjkk kjoj kjok kkaa kkba kkbb kkbd kkbj kkbo kkda kkdd kkdj kkdo kkjb kkjd kkjk kkkj kkkk kkoa kkob kkoj kkoo koab koak koba kobb kobk kobo koda kodj kodk kodo koja kojb kojd kojo koka kokb kokk koko koob kook kooo obad obak obba obbo obja obkb obok odbo odda oddd odoo ojak ojok okak okja okka okko okok ooaa ooak ooba ooda oooo