a-be a-ha aaaa aaab aaae aaah aaba aabb aabh aaea aaha aaoe aaoo abaa abab abae abb- abba abbb abbe abbo abee abha abho aboa abob aboh aboo ahab ahah ahha ahoa ahoe aoah aoba baaa baah baba babb babe babo baha baho baoh bbbb bbeb beah beba bebb bebe bebo beeb beo- bhao boab boba bobb bobe bobo boea boee boeo boha boho boob booe booh eaba eabh ebba ebbo eboe eboo eeea eeee ehaa ehea eheh haab haba habe habo haha haho heah hebb hebe hebo heeb hehe heho hhaa hhhh hoba hobe hobo hoha hohe hoho hooe o-eo oahe obba obbo obea oboe ohba ohbe ohee ohho ohob ohoh ooaa ooba oobe ooha ooho oooh oooo