a-ak a-be aaaa aaab aaae aaba aabb aaea aaka aake aaku abaa abab abae abak abau abb- abba abbb abbe abee abua abue abuk aeka akaa akae akee akeu akka akku akua auaa aube auke baaa baak baba babb babe babu baek bak- baka bake baku bau- bauk bbau bbbb bbeb beak beau beba bebb bebe beeb beek beka beke beuk buba bubb bube bubu buea bueu buka buke bukk buku eaba ebba eeea eeee eeka eeke eka- ekab ekeb ekek ekka euba kaaa kaab kaak kaba kabb kabe kabu kaka kake kakk kaku kau- kaub kaue kauk kbaa kbab kbae kbak kbba kbbb kbbe kbbk kbbu kbeb kbee kbek kbkb kbkk kbua kbub kbue kbuk kbuu kea- keak keau keba kebb kebe kebu keek keka kekb keke keku kkaa kkba kkbb kkbe kkea kkkk kkua kkuu kuau kuba kubb kube kubu kuek kueu kuka kuke kukk kuku kuub kuuk kuuu uaua ubba ubbe ubek ueba ukba ukek ukeu uuuu