a-ya a-yo aaaa aaab aaap aaba aabb aabp aaby aaoo aapa aapo aaup abaa abab abap abau abay abb- abba abbb abbo abby aboa abob aboo abou aboy abpa abpp abua abuy abyy aoba aopo apao apap apay apba apo- apoo apop apou appa appu appy apua apup auaa auby auoy auyo ay-o ayao ayay ayoo ayou ayub ayup ayya baaa baba babb babo babu baby bapa bapp bapu bau- baya bayo bayu bbau bbay bbbb bboy bbyo boab boba bobb bobo bobu boby boob boop bopa bopp boua boup bouy boya boyo bpay buba bubb bubo bubu buoy bupa buyo buyu byoa byob byop oaau obay obba obbo obby oboy ooaa ooba ooby oooo opap opo- oppa oppo oppy opua oupa ouu- ouya oyou oypa paap paba pabu papa papb papp papy paua paup pay- paya payb payp pbpa poba pobo poop pop- popa popo popp popy poup pouy poya poyo ppap ppoa pppa pppo pppp puao pubu puoy pupa pupu pupy puy- puya puyo pyao pyay pyo- pypy uaua ubay ubba ubbo upay upby uppa uppp uppu uppy upup upya uuuu yaba yabo yaou yapa yapp yaup yaya yayo yayu yoba yobo yoop yopo yopy youa youb youp yoyo ypoa yuba yubu yuya yuyu yyyy