a-ak a-be a-ii aaaa aaab aaae aaai aaba aabb aabi aaea aaib aaii aaka aake abaa abab abae abai abak abb- abba abbb abbe abbi abee abia abib abie aebi aeka aiai aiba aiea aiee aiia aiib aika aike aiki akaa akae akai akee akia akie akik akka akki ba-i baaa baak baba babb babe babi baek baia baib baie baik bak- baka bake baki bbbb bbeb beak beba bebb bebe bebi beeb beek beia beik beka beke beki biak biba bibb bibe bibi bieb bike eaba ebba eeea eeee eeka eeke eiei eika eike eiki eka- ekab ekeb ekek ekka ekki i-be iaaa iaai iaba iaea iaia ibea ibia ibie ieie iiie iiii ikea ikee ikki kaaa kaab kaai kaak kaba kabb kabe kabi kaei kaia kaib kaie kaii kaik kaka kake kaki kakk kbaa kbab kbae kbai kbak kbba kbbb kbbe kbbi kbbk kbeb kbee kbek kbia kbib kbie kbik kbkb kbkk kea- keak keba kebb kebe kebi keek keib keii keik keka kekb keke keki kiab kiai kiba kibb kibe kibi kiia kiii kiik kika kiki kikk kkaa kkai kkba kkbb kkbe kkbi kkea kkia kkik kkkk