-er a-a a-b aaa aab aae aag aak aao aar ab- aba abb abe abg abk abo abr aea aeb aee aeg aek aeo aer ag- aga agb age agg agk ago agr aka akb ake akg akk ako akr aoa aob aoe aog aok aoo aor ar- ara arb are arg ark aro arr baa bab bae bag bak bao bar bba bbb bbe bbg bbk bbo bbr be- bea beb bee beg bek beo ber bga bgb bge bgg bgk bgo bgr bka bkb bke bkg bkk bko bkr boa bob boe bog bok boo bor bra brb bre brg brk bro brr eaa eab eae eag eak eao ear eba ebb ebe ebg ebk ebo ebr eea eeb eee eeg eek eeo eer ega egb ege egg ego egr eka ekb eke ekg eko ekr eo- eoa eob eoe eog eok eoo eor era erb ere erg erk ero err gaa gab gae gag gak gao gar gba gbe gbg gbk gbo gbr ge- gea geb gee geg gek geo ger gga ggb ggg ggo ggr gka gkb gko goa gob goe gog gok goo gor gra grb gre grg grk gro grr ka- kaa kab kae kag kak kao kar kba kbb kbe kbk kbo kbr ke- kea keb kee keg kek keo ker kga kgb kgo kkb kke kkk kkr koa kob koe kog kok koo kor kra krg krk kro krr oaa oab oae oag oak oao oar ob- oba obb obe obg obk obo obr oea oeb oee oeg oeo oer oga oge ogg ogo oka okb oke okg okk oko okr oo- ooa oob oog ook ooo oor or- ora orb ore org ork oro orr ra- raa rab rae rag rak rao rar rba rbb rbe rbg rbk rbo rbr re- rea reb ree reg rek reo rer rga rgb rge rgg rgk rgo rgr rkb rke rkg rkk rko roa rob roe rog rok roo ror rra rrb rrg rrk rrr

a-ak a-be a-ok aaaa aaab aaae aaar aaba aabb aaea aage aaka aake aaoe aaoo aara aare aaro abaa abab abae abag abak abar abb- abba abbb abbe abbo abbr abee aber aboa abob abok aboo abor abra abro aeer aega aeka aer- aera aero ag-o agag agao agar agba agbo agea agee ager agga agge agob agog agoo agra agre agro akaa akae akao akar akee akeg aker akka akko akok akr- akra akre aoba aora aorb arab arae arag arak arar arba arbe area aree areg arek areo arga argb arge argo arka arke arko aroa arob aroe aroo aror arr- arra arre arrg arrk arro arrr baaa baak baar baba babb babe babo babr baek baer baga bage bagg bago bak- baka bake bako bakr bar- bara barb bare barg bark baro barr bbbb bbeb bbga bbrg beag beak bear beba bebb bebe bebo beeb beeg beek beer bega begg bego beka beke beko beo- beok beor bera bere berg berk bero berr boab boag boak boar boba bobb bobe bobo boea boee boeo boer boga boge bogg bogo boka boke boko boob booe boog book boor bor- bora bore borg bork boro borr brab brae brag brak brao brea breb bree breg brek breo brer brka brkb broa brob broe brog brok broo bror brrr eaba eaga eage eara earb eare earo ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eega eeka eeke eera eerg eero egaa egae egao egar egba egbe egea egee eger eggb egge eggo ego- egor egra egre eka- ekab ekeb ekek eker ekka ekoa eoka eora eore erba erbb erbe ereb erer erg- erga ergg ergo erke erob eroe eroo erra erre erro gaar gaba gabb gabe gabo gabr gaea gaer gaga gage gagg gago gara garb gare garg garo garr gbag gbbo geab gear geba gebe geek geer gege gegg gego geko geo- geog gera gerb gere gero gggg goar goba gobe gobo goer goga gogo goke goog gook goor gora gorb gore gorg goro gorr grab grae grbr grea greb gree greg grob grog grok groo gror grrr kaaa kaab kaag kaak kaar kaba kabb kabe kabg kabo kabr kaeo kaer kag- kaga kagb kage kagg kago kagr kaka kake kakk kako kaoa kaog kaok kaor kara karb kare karg kark karo karr kbaa kbab kbae kbak kbar kbba kbbb kbbe kbbg kbbk kbbo kbbr kbeb kbee kbek kbeo kber kbga kbgb kbge kbgg kbgo kbgr kbkb kbkg kbkk kbko kbkr kboa kbob kboe kbok kboo kbra kbrb kbre kbrg kbrk kbro kea- keag keak kear keba kebb kebe kebr keek keer kega kege kegg kegk kegr keka kekb keke keko keok ker- kera kerb kere kerk kero kerr kgab kgak kgba kgbb kgbr kgeb kgeo kgga kggg kggo kggr kgoe kgor kgra kgrb kgre kgrg kgrk kgro kgrr kkaa kkag kkar kkba kkbb kkbe kkbg kkbo kkbr kkea kkeg kkgb kkgo kkgr kkkk kkoa kkob kkoo kkor kkrb kkre kkrk kkro kkrr koab koae koak koar koba kobb kobe kobk kobo kobr koea koga kogb koge kogg kogo koka kokb koke kokk koko kokr koob koog kook kooo koor kora korb kore korg kork koro korr krab krae krag krak krar krba krbb krbe krbg krbk krbr krea kreb kree krek kreo krka krke krkk krko krkr kroa krob kroe krog krok kroo kror krrb krre krrg krrk krro krrr o-eo oaer oake oara oare obak obba obbo obea ober obkb oboe obok obor obra obre obro oegb oera oere ogae ogar ogb ogba ogbe ogea ogee oger ogge ogoa ogog ogra ogre ogro okak oker okgo okka okko okok okor okra okre okro ooaa ooak ooba oobe ooer oooo oora oore orab orae orak orao orar orba orbb orbe orbo ore- orea oreb oreg orek oreo orer orga orge orgo orka orke orko oro- oroe orok oror orra orro raab raag raak raba rabb rabe rabk rabo raeg raer raga rage ragg rago raka rake rakk raob raok rara rarb rare rark raro rbbb