a-ak a-be aaaa aaab aaae aaba aabb aaea aaka aake abaa abab abae abaj abak abb- abba abbb abbe abee aeka ajab ajak ajba ajee ajka akaa akae akee akka baaa baak baba babb babe baek baja bak- baka bake bbbb bbeb beak beba bebb bebe beeb beej beek beja beka beke eaba ebba eeea eeee eeka eeke eka- ekab ekeb ekek ekka jaak jaba jaja jaka jake jbaa jebb jebe jeke kaaa kaab kaak kaba kabb kabe kaja kajb kaje kajk kaka kake kakj kakk kbaa kbab kbae kbak kbba kbbb kbbe kbbk kbeb kbee kbek kbja kbjk kbkb kbkk kea- keak keba kebb kebe keek kejb kejj keka kekb keke kjaa kjae kjak kjbb kjee kjjj kjjk kjke kjkj kjkk kkaa kkba kkbb kkbe kkbj kkea kkjb kkjk kkkj kkkk