a-be a-ha aaaa aaab aaac aaae aaah aaar aaba aabb aabc aabh aaca aacb aacc aace aach aaco aacr aaea aaec aaha aaoe aaoo aara aarc aare aaro abaa abab abac abae abar abb- abba abbb abbe abbo abbr abca abcb abcc abch abcr abec abee aber abha abho abhr aboa abob aboh aboo abor abra abrc abro acaa acab acac acae acar acba acca accc acce acch acco ace- acea acec aceh acer acha ache achh acho achr acoa acoe acoh acor acr- acra acrc acre acro acrr aeac aecb aeer aer- aera aerc aero ahab ahac ahah ahar ahha ahoa ahoe ahor ahra ahrc ahre ahrr aoah aoba aoca aoce aora aorb arab arac arae arah arar arba arbe arbh arc- arca arce arch arco area arec aree areh areo arh- aroa arob aroe aroo aror arr- arra arrc arre arrh arro arrr baaa baah baar baba babb babe babo babr bac- baca bacc bace bach baco baer baha baho bahr baoh bar- bara barb barc bare barh baro barr bbbb bbch bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bche bcor bcra beah bear beba bebb bebe bebo beca bech beeb beer behr beo- beor bera berc bere bero berr bhao bhar bhca bhcc bher bhor bhra boab boac boar boba bobb bobe bobo boca boce boch boco boea boec boee boeo boer boha boho bohr boob booc booe booh boor bor- bora bore borh boro borr brab brac brae brah brao brca brcb brce brea breb brec bree breo brer broa brob broc broe broh broo bror brrr c-bo caaa caab caac caah caba cabe cabo cac- caca cacc cace cach caco cacr caec caer caha cahe caor cara carb carc care caro carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbha cbre cbrh ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccee ccha cche cchr ccob ccoc ccra ccrc ccre ceac cear ceba cec- ceca cece ceco ceeb ceec ceor cer- cera cerc cere cero chaa chab chac chae chah chao char chca chce chch chea cheb chec chee cheh cher chha choc choh choo chor chra chrb chrc chro chrr coba cobb cobe cobh cobo coca coce coch coco coha coho coob cooh cor- cora corb corc core coro corr crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree creh creo crob croc croe croh croo cror eaba eabh eaca eacc each eaec eara earb eare earh earo ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco echa eche echo eco- ecra ecrc ecrr eeca eeea eeee eeoc eera eerc eero ehaa ehcc ehea eheh eher ehre eora eore erba erbb erbe erca ercc erce erch ereb erec erer erhc erob eroc eroe eroo erra errc erre erro haab haar haba habe habo hace haco haec haha haho haor hara harc hare harh haro harr hbar hboc hcbc hcca hccb hccc hcch heah hear hebb hebe hebo hebr heca hech heeb heer hehe heho heor hera herb herc here hero herr hhaa hhhh hoac hoar hoba hobe hobo hoca hoce hoch hocr hoer hoha hohe hoho hooe hoor hora horc hore horo horr hrac hree hrob hrrc o-eo oaer oahe oara oare obba obbo obea obec ober oboe obor obra obre obrh obro ocab ocac ocbc occa occc oce ocee ocha oche ocra ocre ocro ocrr oec- oeca oecc oeec oera oere ohba ohbe ohcc ohee oher ohho ohob ohoh ohra ohre ooaa ooba oobe oocr ooer ooha ooho oooh oooo oora oore orab orac orae orah orao orar orba orbb orbe orbo orca orce orch orco ore- orea oreb orec oreh oreo orer orhe oro- oroe oror orra orro raab raba rabb rabe rabo rac- raca racc race rach raco raec raer raha rahe rahr raob raoc raoh rara rarb rare raro rbbb rbbr rboh rcac rcbc rcbo rccb rccc rchb rea- reac reae reao rear reba rebb rebe rebo reca recc rece rech recr reeb reha rehb rehe rera rere rero rhae rhce rhea rheb rhee rheo rhoa rhob rhoc rhoh roab roar rob- roba robb robe robo roca rocc roce roch roco roea roer roha rohe rohr roob roor rora rorc rore roro rrah rrrr