a-ya aaaa aaab aaad aaba aabb aabd aaby aada aadu abaa abab abad abau abay abb- abba abbb abby abda abdu abdy abua abud abuy abyy adaa adab adad aday adba adda addd addu addy adua adub adya auaa auby ayad ayay ayda ayub ayya baaa baad baba babb babu baby bada badb badd badu bady bau- baud baya bayu bbad bbau bbay bbbb bbdd bday buad buba bubb bubu buda budb budd budu budy buyu byyd daab daad daau daba dabb dabu dada dadu dady daub daud daya dayu dday dddd ddub duaa duab duad dub- duba dubb dubu duby duda dudd dudu dya- dyab dyad dybu dydd uaua ubay ubba ubud udaa udad udau uday uuuu yaba yada yadu yaud yaya yayu ydad yday yuba yubu yuda yudu yuya yuyu yyyy