a-be a-ya a-yo aaaa aaab aaae aaba aabb aaby aaea aaoe aaoo abaa abab abae abay abb- abba abbb abbe abbo abby abee abey aboa abob aboo aboy abye abyy aeby aoba ay-o ayao ayay ayoo ayya baaa baba babb babe babo baby baya baye bayo bbay bbbb bbeb bboy bbyo beay beba bebb bebe bebo beby beeb beey beo- beya beye boab boba bobb bobe bobo boby boea boee boeo boey boob booe boya boye boyo byoa byob eaba ebay ebba ebbo ebby eboe eboo eboy ebya eeby eeea eeee eyeb eyey o-eo obay obba obbo obby obea obey oboe oboy oeya oeye oeyo ooaa ooba oobe ooby oooo oyee yaba yabo yaya yayo yeye yeyo yoba yobo yoye yoyo yyyy