a-be aaaa aaab aaae aaba aabb aaea aaoe aaoo abaa abab abae abau abb- abba abbb abbe abbo abee abez aboa abob aboo abou abua abue abza abzu aoba aoeu auaa aube aza- azab azaz azo- azoo azua azza azzo baaa baaz baba babb babe babo babu baez bau- baza baze bazo bbau bbbb bbeb beau beba bebb bebe bebo beeb beo- beze bezu boab boaz boba bobb bobe bobo bobu boea boee boeo boob booe booz boua boue boza bozo buba bubb bube bubo bubu buea bueu buuz buza buze buzz bzoe bzou bzzz eaba ebba ebbo eboe eboo eeea eeee eeze euba ezuz ezzo o-eo oaau oaze obba obbo obea oboe ooaa ooba oobe oooo ooze ouea ouu- ouza ouze ouzo ozee uaua ubba ubbe ubbo ueba uuuu uzeb zaba zabo zabu zaza zazu zeae zeba zebe zebu zeze zobo zoea zoo- zoza zozo zozu zubo zubu zuoz zuzu zzzz