a-be a-ha aaaa aaab aaae aaah aaar aaba aabb aabh aaea aaha aaoe aaoo aara aare aaro abaa abab abae abar abb- abba abbb abbe abbo abbr abee aber abha abho abhr aboa abob aboh aboo abor abra abro aeer aer- aera aero ahab ahah ahar ahha ahoa ahoe ahor ahra ahre ahrr aoah aoba aora aorb arab arae arah arar arba arbe arbh area aree areh areo arh- aroa arob aroe aroo aror arr- arra arre arrh arro arrr baaa baah baar baba babb babe babo babr baer baha baho bahr baoh bar- bara barb bare barh baro barr bbbb bbeb beah bear beba bebb bebe bebo beeb beer behr beo- beor bera bere bero berr bhao bhar bher bhor bhra boab boar boba bobb bobe bobo boea boee boeo boer boha boho bohr boob booe booh boor bor- bora bore borh boro borr brab brae brah brao brea breb bree breo brer broa brob broe broh broo bror brrr eaba eabh eara earb eare earh earo ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eera eero ehaa ehea eheh eher ehre eora eore erba erbb erbe ereb erer erob eroe eroo erra erre erro haab haar haba habe habo haha haho haor hara hare harh haro harr hbar heah hear hebb hebe hebo hebr heeb heer hehe heho heor hera herb here hero herr hhaa hhhh hoar hoba hobe hobo hoer hoha hohe hoho hooe hoor hora hore horo horr hree hrob o-eo oaer oahe oara oare obba obbo obea ober oboe obor obra obre obrh obro oera oere ohba ohbe ohee oher ohho ohob ohoh ohra ohre ooaa ooba oobe ooer ooha ooho oooh oooo oora oore orab orae orah orao orar orba orbb orbe orbo ore- orea oreb oreh oreo orer orhe oro- oroe oror orra orro raab raba rabb rabe rabo raer raha rahe rahr raob raoh rara rarb rare raro rbbb rbbr rboh rea- reae reao rear reba rebb rebe rebo reeb reha rehb rehe rera rere rero rhae rhea rheb rhee rheo rhoa rhob rhoh roab roar rob- roba robb robe robo roea roer roha rohe rohr roob roor rora rore roro rrah rrrr