a-be a-do aaaa aaab aaad aaae aaam aaba aabb aabd aabm aada aade aaea aaem aama aamb aamd aame aamo aaoe aaoo abaa abab abad abae abam abb- abba abbb abbe abbo abda abdo abed abee abma abmb aboa abob abod aboo adaa adab adad adae adam adao adba adda addd adde addo adea adeb adee adem adeo adma admb adme adob adod adoe adoo aede aeom amaa amad amae amam amb- amba ambe ambo amda amdo amed amee amm- amma amme ammo amob amod amoo aoba aoma baaa baad baam baba babb babe babm babo bada badb badd bade bado baed bama bamb bame bamm bbad bbbb bbdd bbdo bbeb bead beam beba bebb bebe bebo beda bede bedo beeb beed beem bema beme beo- beod bmaa bmdb boab boad boba bobb bobe bobo boda bodb bode bodo boea boee boeo boma bomb bome boob bood booe boom d-bo daab daad daae daam daba dabb dabo dada dade dado daeb daem dama damb dame damm damo dddd dead deae deba debe deda dedd dede dedo deeb deed deem dem- dema demb demd deme demo dmaa dmab dmae dmba dmea doab doae doba dobb dobe dod- doda dodd dode dodo doea doma domb dome domm domo doob dood doom eaba eada eadb eadd eama eame eaom ebam ebba ebbo ebed eboe eboo edad edam edda edde eddm eddo ede- edea edem edma edme edod edom eede eeea eeee eemo emad emae emam emba embd embe embo emma emme emod eode maaa maad maam maba mabe mabo mada madb madd made mado maee maem maeo mama mame mamo mbam mbba mbda mbdb mbed mddm mdea mdma mdme mead mebe mebo meda medb medd mede medo meed meem mema meme memo mmaa mmab mmda mmdb mmea mmmd mmmm mmod moaa moab moam moba mobb mobe mobo moda modd mode modo moea moed moma mome momo mooa moob mood mooe o-eo oade oadm oama obad obba obbo obea obed oboe odam odbo odda oddd odea oded odem odeo odma odom odoo oedo oeme omam omao ombe ombo omda omdb omed omee omeo omma omo- omoa omoe omoo ooaa ooba oobe ooda ooma oome oooo