a-ha aaaa aaab aaah aaav aaba aabb aabh aaha aaoo aava abaa abab abb- abba abbb abbo abha abho aboa abob aboh aboo abov abva ahab ahah ahha ahoa ahva aoah aoba avab avao avva avvo baaa baah baba babb babo baha baho baoh bava bbbb bhao boab boba bobb bobo boha boho boob booh bova bovo haab haba habo haha haho hava hhaa hhhh hoba hobo hoha hoho hova obba obbo ohba ohho ohob ohoh ooaa ooba ooha ooho oooh oooo ovo- ovoo vaho vava vhhh voho vvob vvvv