-er a-a a-b aaa aab aae aaf aag aak aao aar ab- aba abb abe abf abg abk abo abr aea aeb aee aef aeg aek aeo aer af- afa afb afe aff afg afk afo afr ag- aga agb age agf agg agk ago agr aka akb ake akg akk ako akr aoa aob aoe aof aog aok aoo aor ar- ara arb are arf arg ark aro arr baa bab bae baf bag bak bao bar bba bbb bbe bbf bbg bbk bbo bbr be- bea beb bee bef beg bek beo ber bfa bfb bfe bff bfg bfo bfr bga bgb bge bgf bgg bgk bgo bgr bka bkb bke bkf bkg bkk bko bkr boa bob boe bof bog bok boo bor bra brb bre brf brg brk bro brr eaa eab eae eaf eag eak eao ear eba ebb ebe ebf ebg ebk ebo ebr eea eeb eee eef eeg eek eeo eer ef- efa efb efe eff efg efo efr ega egb ege egf egg ego egr eka ekb eke ekf ekg eko ekr eo- eoa eob eoe eof eog eok eoo eor era erb ere erf erg erk ero err faa fab fae faf fag fak fao far fba fbb fbe fbf fbg fbk fbo fbr fea feb fee fef feg fek feo fer ffa ffe fff ffg ffk ffo ffr fga fgb fge fgf fgg fgr fka fkb fkf fkg fkk foa fob foe fof fog fok foo for fra frb fre frf frg frk fro frr gaa gab gae gaf gag gak gao gar gba gbe gbf gbg gbk gbo gbr ge- gea geb gee gef geg gek geo ger gfa gfb gfe gff gfk gfo gfr gga ggb ggg ggo ggr gka gkb gko goa gob goe gof gog gok goo gor gra grb gre grf grg grk gro grr ka- kaa kab kae kaf kag kak kao kar kba kbb kbe kbf kbk kbo kbr ke- kea keb kee kef keg kek keo ker kfa kff kfg kfo kga kgb kgf kgo kkb kke kkk kkr koa kob koe kof kog kok koo kor kra krf krg krk kro krr oaa oab oae oaf oag oak oao oar ob- oba obb obe obf obg obk obo obr oea oeb oee oef oeg oeo oer of- ofa ofb ofe off ofg ofo ofr oga oge ogf ogg ogo oka okb oke okg okk oko okr oo- ooa oob oof oog ook ooo oor or- ora orb ore orf org ork oro orr ra- raa rab rae raf rag rak rao rar rba rbb rbe rbf rbg rbk rbo rbr re- rea reb ree ref reg rek reo rer rfa rfb rfe rff rfg rfk rfo rfr rga rgb rge rgf rgg rgk rgo rgr rkb rke rkf rkg rkk rko roa rob roe rof rog rok roo ror rra rrb rrf rrg rrk rrr

a-ak a-be a-ok aaaa aaab aaae aaaf aaar aaba aabb aaea aafa aafb aaff aage aaka aake aaoe aaoo aara aare aaro abaa abab abae abaf abag abak abar abb- abba abbb abbe abbo abbr abee aber abff aboa abob abof abok aboo abor abra abro aeaf aeer aega aeka aer- aera aero afaa afak afao afar afee afek afer affa affo afgf afka afkr afoa afoe afog afoo afor afr- afra afre afro ag-o agag agao agar agba agbo agea agee ager agfa 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 araf arag arak arar arba arbe area aree aref areg arek areo arfa arfb arff arga argb arge argo arka arke arko aroa arob aroe aroo aror arr- arra arre arrg arrk arro arrr baaa baaf baak baar baba babb babe babo babr baek baer baff bafo baga bage bagg bago bak- baka bake bako bakr bar- bara barb bare barf barg bark baro barr bbbb bbeb bbga bbrg beaf beag beak bear beba bebb bebe bebo beeb beef beeg beek beer befa befe beff befo bega begg bego beka beke beko beo- beof beok beor bera bere berg berk bero berr bfgf boab boag boak boar boba bobb bobe bobo boea boee boef boeo boer bofa bofe boff boga boge bogg bogo boka boke boko boob booe boof boog book boor bor- bora bore borf borg bork boro borr brab brae braf brag brak brao brea breb bree bref breg brek breo brer brka brkb broa brob broe brog brok broo bror brrr eaaf eaba eafb eaga eage eara earb eare earo ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eefa eefe eega eeka eeke eera eerg eero ef-g efab efbr efeo effa efke efor egaa egae egao egar egba egbe egea egee eger egfr eggb egge eggo ego- egor egra egre eka- ekab ekeb ekek eker ekka ekoa eoka eora eore eraf erba erbb erbe ereb erer erg- erga ergg ergo erke erob eroe eroo erra erre erro f--k faaa faba fabe fabo faeb fafa fafe faff fafg fafo fage fagg fago fake fako fara farb fare farg fark faro farr fbar feaf feak fear feba febo feeb feek feer fefe feff fefo fege fegg feke feko feof fera ferb fere ferk fero ferr ffar ffee ffff ffrr fkab foaf foak foar foba foer fofo foge fogg fogo foke foof fook for- fora forb fore forg fork foro forr frab frae frag frak frea free freo frob froe frog gaar gaba gabb gabe gabo gabr gaea gaer gafa gafb gaff gaga gage gagg gago gara garb gare garf garg garo garr gbag gbbo geab gear geba gebe geek geer gefe gege gegg gego geko geo- geof geog gera gerb gere gero gfer gffa gfoa gfor ggfg gggg goaf goar goba gobe gobo goef goer gofe goff gofr goga gogo goke goof goog gook goor gora gorb gore gorf gorg goro gorr grab grae graf grbr grea greb gree gref greg grfa grob