a-do aaaa aaab aaad aaam aaba aabb aabd aabm aada aama aamb aamd aamo aaoo abaa abab abad abam abb- abba abbb abbo abda abdo abma abmb aboa abob abod aboo adaa adab adad adam adao adba adda addd addo adma admb adob adod adoo amaa amad amam amb- amba ambo amda amdo amm- amma ammo amob amod amoo aoba aoma baaa baad baam baba babb babm babo bada badb badd bado bama bamb bamm bbad bbbb bbdd bbdo bmaa bmdb boab boad boba bobb bobo boda bodb bodo boma bomb boob bood boom d-bo daab daad daam daba dabb dabo dada dado dama damb damm damo dddd dmaa dmab dmba doab doba dobb dod- doda dodd dodo doma domb domm domo doob dood doom maaa maad maam maba mabo mada madb madd mado mama mamo mbam mbba mbda mbdb mddm mdma mmaa mmab mmda mmdb mmmd mmmm mmod moaa moab moam moba mobb mobo moda modd modo moma momo mooa moob mood oadm oama obad obba obbo odam odbo odda oddd odma odom odoo omam omao ombo omda omdb omma omo- omoa omoo ooaa ooba ooda ooma oooo