a-be a-ya aaaa aaab aaae aaba aabb aaby aaea abaa abab abae abau abay abb- abba abbb abbe abby abee abey abua abue abuy abye abyy aeby auaa aube auby ayay ayub ayya baaa baba babb babe babu baby bau- baya baye bayu bbau bbay bbbb bbeb beau beay beba bebb bebe beby beeb beey beya beye buba bubb bube bubu buea bueu buyu eaba ebay ebba ebby ebya eeby eeea eeee euba eyeb eyey uaua ubay ubba ubbe ueba uuuu uyea yaba yaue yaya yayu ye-u yeue yeye yuba yubu yuea yuya yuye yuyu yyyy