a-ya a-yo aaaa aaab aaba aabb aaby aaoo abaa abab abau abay abb- abba abbb abbo abby aboa abob aboo abou aboy abua abuy abyy aoba auaa auby auoy auyo ay-o ayao ayay ayoo ayou ayub ayya baaa baba babb babo babu baby bau- baya bayo bayu bbau bbay bbbb bboy bbyo boab boba bobb bobo bobu boby boob boua bouy boya boyo buba bubb bubo bubu buoy buyo buyu byoa byob oaau obay obba obbo obby oboy ooaa ooba ooby oooo ouu- ouya oyou uaua ubay ubba ubbo uuuu yaba yabo yaou yaya yayo yayu yoba yobo youa youb yoyo yuba yubu yuya yuyu yyyy