a-be a-do aaaa aaab aaad aaae aaba aabb aabd aada aade aadu aaea aaoe aaoo abaa abab abad abae abau abb- abba abbb abbe abbo abda abdo abdu abed abee aboa abob abod aboo abou abua abud abue adaa adab adad adae adao adba adda addd adde addo addu adea adeb adee adeo adob adod adoe adoo adua adub adue aede aoba aoeu auaa aube aude audo baaa baad baba babb babe babo babu bada badb badd bade bado badu baed bau- baud bbad bbau bbbb bbdd bbdo bbeb bead beau beba bebb bebe bebo beda bede bedo bedu beeb beed beo- beod boab boad boba bobb bobe bobo bobu boda bodb bode bodo bodu boea boee boeo boob bood booe boua boud boue buad buba bubb bube bubo bubu buda budb budd bude budo budu buea bueu d-bo daab daad daae daau daba dabb dabo dabu dada dade dado dadu daeb daeu daou daub daud daue dddd ddub dead deae deau deba debe debu deda dedd dede dedo dedu deeb deed deua deue doab doae doba dobb dobe dobu dod- doda dodd dode dodo doea doob dood doub doud doue duaa duab duad dub- duba dubb dube dubu duda dudd dude dudo dudu duo- eaba eada eadb eadd ebba ebbo ebed eboe eboo edad edda edde eddo ede- edea edod edou eede eedu eeea eeee eode euba eude o-eo oaau oade obad obba obbo obea obed oboe odbo odda oddd odea oded odeo odoo odou oedo ooaa ooba oobe ooda oooo ouad oude ouea oued ouu- uaua ubba ubbe ubbo ubod ubud udaa udad udau udea udoo ueba ueda uuuu