a-ak a-be a-do a-ok aaaa aaab aaad aaae aaba aabb aabd aada aade aaea aaka aake aaoe aaoo abaa abab abad abae abak abb- abba abbb abbe abbo abda abdo abed abee aboa abob abod abok aboo adaa adab adad adae adak adao adba adda addd adde addo adea adeb adee adeo adob adod adoe adok adoo aede aeka akaa akae akao aked akee akka akko akok aoba baaa baad baak baba babb babe babo bada badb badd bade bado baed baek bak- baka bake bako bbad bbbb bbdd bbdo bbeb bead beak beba bebb bebe bebo beda bede bedo beeb beed beek beka beke beko beo- beod beok boab boad boak boba bobb bobe bobo boda bodb bode bodo boea boee boeo boka boke boko boob bood booe book d-bo daab daad daae daba dabb dabo dada dade dado daeb daka dake dako dddd dead deae deak deba debe deda dedd dede dedo deeb deed deek dek- deka deke dkba doab doae doak doba dobb dobe dod- doda dodd dode dodo doea doek doka doke doko doob dood dook eaba eada eadb eadd ebba ebbo ebed eboe eboo edad edda edde eddo ede- edea edod eede eeea eeee eeka eeke eka- ekab ekeb eked ekek ekka ekoa eode eoka kaaa kaab kaak kaba kabb kabd kabe kabo kad- kada kadd kade kado kaeo kaka kake kakk kako kaoa kaok kbaa kbab kbad kbae kbak kbba kbbb kbbd kbbe kbbk kbbo kbdb kbde kbdo kbeb kbed kbee kbek kbeo kbkb kbkk kbko kboa kbob kbod kboe kbok kboo kdaa kdab kdad kdae kdak kdao kdbb kddb kddd kddk kdeb kdka kdkb kdkd kdkk kdko kdoe kdok kea- kead keak keba kebb kebe keda kedb kedd kede kedo keed keek keka kekb keke keko keok kkaa kkba kkbb kkbd kkbe kkbo kkda kkdd kkdo kkea kked kkkk kkoa kkob kkoo koab koae koak koba kobb kobe kobk kobo koda kode kodk kodo koea koed koka kokb koke kokk koko koob kook kooo o-eo oade oake obad obak obba obbo obea obed obkb oboe obok odbo odda oddd odea oded odeo odoo oedo okak oked okka okko okok ooaa ooak ooba oobe ooda oooo