a-be a-ha aaaa aaab aaae aaaf aaah aaar aaba aabb aabh aaea aafa aafb aaff aaha aaoe aaoo aara aare aaro abaa abab abae abaf abar abb- abba abbb abbe abbo abbr abee aber abff abha abho abhr aboa abob abof aboh aboo abor abra abro aeaf aeer aer- aera aero afaa afao afar afee afer affa affo afoa afoe afoo afor afr- afra afre afro ahab ahah ahar ahfa ahha ahoa ahoe ahor ahra ahre ahrr aoah aoba aora aorb arab arae araf arah arar arba arbe arbh area aree aref areh areo arfa arfb arff arh- aroa arob aroe aroo aror arr- arra arre arrh arro arrr baaa baaf baah baar baba babb babe babo babr baer baff bafo baha baho bahr baoh bar- bara barb bare barf barh baro barr bbbb bbeb beaf beah bear beba bebb bebe bebo beeb beef beer befa befe beff befo behr beo- beof beor bera bere bero berr bhao bhar bher bhff bhor bhra boab boar boba bobb bobe bobo boea boee boef boeo boer bofa bofe boff bofh boha boho bohr boob booe boof booh boor bor- bora bore borf borh boro borr brab brae braf brah brao brea breb bree bref breo brer broa brob broe broh broo bror brrr eaaf eaba eabh eafb eara earb eare earh earo ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eefa eefe eera eero efab efbr efeo effa efor ehaa ehea eheh eher ehre eora eore eraf erba erbb erbe ereb erer erob eroe eroo erra erre erro faaa faah faba fabe fabo faeb fafa fafe faff fafo faha fahr fara farb fare faro farr fbar feaf fear feba febo feeb feer fefe feff fefo fehr feof feoh fera ferb fere fero ferr ffar ffee ffff ffrr foaf foar foba foer fofo fohr foof for- fora forb fore foro forr frab frae frea free freo frob froe froh haab haaf haar haba habe habo hafb hafe haff haha haho haor hara hare harf harh haro harr hbar heaf heah hear hebb hebe hebo hebr heeb heef heer hefe hehe heho heor hera herb here hero herr hfba hhaa hhhh hhof hoar hoba hobe hobo hoer hofe hoff hoha hohe hoho hooe hoof hoor hora hore horo horr hree hrob o-eo oaer oafo oahe oara oare obba obbo obea ober oboe obor obra obre obrh obro oera oere ofah ofer off- offa offe offh offo offr ofor ofra ofre ohba ohbe ohee oher ohho ohob ohoh ohra ohre ooaa ooba oobe ooer ooff ooha ooho oooh oooo oora oore orab orae orah orao orar orba orbb orbe orbo ore- orea oreb oreh oreo orer orfe orff orhe oro- oroe orof oror orra orro raab raaf raba rabb rabe rabo raef raer rafa rafe raff raha rahe rahr raob raoh rara rarb rare rarf raro rbaf rbbb rbbr rboh rea- reae reaf reao rear reba rebb rebe rebo reeb reef refe reff refr reha rehb rehe reof rera rere rero rfae rfef rhae rhea rheb rhee rheo rhoa rhob rhoh roab roaf roar rob- roba robb robe robo roea roer rofe roff rofo roha rohe rohr roob roof roor rora rore roro rrah rrrr