a-do aaaa aaab aaad aaaf aaar aaba aabb aabd aada aafa aafb aafd aaff aaoo aara aard aaro abaa abab abad abaf abar abb- abba abbb abbo abbr abda abdo abff aboa abob abod abof aboo abor abra abro adaa adab adad adao adar adba adda addd addo addr adfa adob adod adoo ador adra adro afaa afad afao afar afdb affa affo afoa afoo afor afr- afra afro aoba aora aorb arab arad araf arar arba arda ardf ardo arfa arfb arff aroa arob arod aroo aror arr- arra arro arrr baaa baad baaf baar baba babb babo babr bada badb badd bado badr baff bafo bar- bara barb bard barf baro barr bbad bbbb bbdd bbdo bd-r boab boad boar boba bobb bobo boda bodb bodo bofa bofd boff boob bood boof boor bor- bora bord borf boro borr brab brad braf brao brda brdo broa brob brod broo bror brrr d-bo daab daad daar daba dabb dabo dada dado dafa daff dafo dara darb dard darf daro darr dbar dbfo dddd dfaf dffa dfrf doab doar doba dobb dod- doda dodd dodo doff doob dood doof door dora dord dorf doro dorr draa drab drad draf drar drba drda drob drod drof drra faaa faad faba fabd fabo fada fadd fado fafa faff fafo fara farb fard faro farr fbar fdoa ffar ffff ffrr foad foaf foar foba foda fofo food foof for- fora forb ford foro forr frab frad frob oafo oara obad obba obbo obor obra obro odbo odda oddd odoo odor odra ofdr off- offa offo offr ofor ofra ooaa ooba ooda ooff oooo oora oord orab orad orao orar orba orbb orbo orda ordo orff oro- orof oror orra orro raab raad raaf raba rabb rabo rada radd rado radr rafa raff raob rara rarb rarf raro rbaf rbbb rbbr rdfa roab road roaf roar rob- roba robb robo roda rodd rodo roff rofo roob rood roof roor rora roro rrad rrrr