a-be a-do aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aada aade aaea aafa aafb aafd aaff aaoe aaoo aara aard aare aaro abaa abab abad abae abaf abar abb- abba abbb abbe abbo abbr abda abdo abed abee aber abff aboa abob abod abof aboo abor abra abro adaa adab adad adae adao adar adba adda addd adde addo addr adea adeb adee adeo ader adfa adob adod adoe adoo ador adra adre adro aeaf aede aeer aer- aera aerd aero afaa afad afao afar afdb afee afer affa affo afoa afoe afoo afor afr- afra afre afro aoba aora aorb arab arad arae araf arar arba arbe arda arde ardf ardo area ared aree aref areo arfa arfb arff aroa arob arod aroe aroo aror arr- arra arre arro arrr baaa baad baaf baar baba babb babe babo babr bada badb badd bade bado badr baed baer baff bafo bar- bara barb bard bare barf baro barr bbad bbbb bbdd bbdo bbeb bd-r bead beaf bear beba bebb bebe bebo beda bede bedo beeb beed beef beer befa befe beff befo beo- beod beof beor bera berd bere bero berr boab boad boar boba bobb bobe bobo boda bodb bode bodo boea boee boef boeo boer bofa bofd bofe boff boob bood booe boof boor bor- bora bord bore borf boro borr brab brad brae braf brao brda brdo brea breb bred bree bref breo brer broa brob brod broe broo bror brrr d-bo daab daad daae daar daba dabb dabo dada dade dado daeb daer dafa dafe daff dafo dara darb dard dare darf daro darr dbar dbfo dddd ddre dead deae deaf dear deba debe deda dedd dede dedo deeb deed deef deer defe deff defo deor der- dera derb dere derf dero derr dfaf dfer dffa dfoe dfrf doab doae doar doba dobb dobe dod- doda dodd dode dodo doea doer doff doob dood doof door dora dord dore dorf doro dorr draa drab drad draf drar drba drda drea dred dree dref drob drod drof drra eaaf eaba eada eadb eadd eafb eara earb eard eare earo ebba ebbo ebbr ebed eber eboe eboo ebor ebro edad edar edda edde eddo ede- edea eder edfa edod edra eede eeea eeee eefa eefe eera eero efab efbr efda efeo effa efor eode eora eore erad eraf erba erbb erbe erda erde erdf ereb ered erer erob erod eroe eroo erra erre erro faaa faad faba fabd fabe fabo fada fadd fade fado faeb fafa fafe faff fafo fara farb fard fare faro farr fbar fdoa fead feaf fear feba febo feda fede feeb feed feer fefe feff fefo feod feof fera ferb ferd fere fero ferr ffar ffee ffff ffrr foad foaf foar foba foda fode foed foer fofo food foof for- fora forb ford fore foro forr frab frad frae frea fred free freo frob froe o-eo oade oaer oafo oara oare obad obba obbo obea obed ober oboe obor obra obre obro odbo odda oddd odea oded odeo oder odoo odor odra oedo oera oere ofdr ofer off- offa offe offo offr ofor ofra ofre ooaa ooba oobe ooda ooer ooff oooo oora oord oore orab orad orae orao orar orba orbb orbe orbo orda orde ordo ore- orea oreb ored oreo orer orfe orff oro- oroe orof oror orra orro raab raad raaf raba rabb rabe rabo rada radd rade rado radr raed raef raer rafa rafe raff raob rara rarb rare rarf raro rbaf rbbb rbbr rder rdfa rea- read reae reaf reao rear reba rebb rebe rebo reda redd rede redo redr reeb reed reef refd refe reff refr reod reof rera rerd rere rero rfae rfef roab road roaf roar rob- roba robb robe robo roda rodd rode rodo roea roed roer rofe roff rofo roob rood roof roor rora rore roro rrad rred rrrr