-er a-a a-b aaa aab aae aaf aak aam aao aar ab- aba abb abe abf abk abm abo abr aea aeb aee aef aek aem aeo aer af- afa afb afe aff afk afm afo afr aka akb ake akk akm ako akr ama amb ame amf amk amm amo amr aoa aob aoe aof aok aom aoo aor ar- ara arb are arf ark arm aro arr baa bab bae baf bak bam bao bar bba bbb bbe bbf bbk bbm bbo bbr be- bea beb bee bef bek bem beo ber bfa bfb bfe bff bfm bfo bfr bka bkb bke bkf bkk bkm bko bkr bma bmb bme bmf bmk bmm bmo bmr boa bob boe bof bok bom boo bor bra brb bre brf brk brm bro brr eaa eab eae eaf eak eam eao ear eba ebb ebe ebf ebk ebm ebo ebr eea eeb eee eef eek eem eeo eer ef- efa efb efe eff efm efo efr eka ekb eke ekf eko ekr em- ema emb eme emf emk emm emo emr eo- eoa eob eoe eof eok eom eoo eor era erb ere erf erk erm ero err faa fab fae faf fak fam fao far fba fbb fbe fbf fbk fbm fbo fbr fea feb fee fef fek fem feo fer ffa ffe fff ffk ffm ffo ffr fka fkb fkf fkk fkm fma fmb fme fmf fmm fmo fmr foa fob foe fof fok fom foo for fra frb fre frf frk frm fro frr ka- kaa kab kae kaf kak kam kao kar kba kbb kbe kbf kbk kbm kbo kbr ke- kea keb kee kef kek kem keo ker kfa kff kfm kfo kkb kke kkk kkm kkr kma kmb kme kmf kmk kmm kmo koa kob koe kof kok kom koo kor kra krf krk kro krr m-f m-o m-r maa mab mae maf mak mam mao mar mba mbb mbe mbf mbk mbm mbo mbr mea meb mee mef mek mem meo mer mfa mfb mfe mff mfm mfo mfr mka mkb mke mkk mkm mko mkr mma mmb mme mmf mmk mmm mmo mmr moa mob moe mof mok mom moo mor mra mrb mre mrf mrk mrm mro mrr oaa oab oae oaf oak oam oao oar ob- oba obb obe obf obk obm obo obr oea oeb oee oef oem oeo oer of- ofa ofb ofe off ofm ofo ofr oka okb oke okk oko okr om- oma omb ome omf omm omo omr oo- ooa oob oof ook oom ooo oor or- ora orb ore orf ork orm oro orr ra- raa rab rae raf rak ram rao rar rba rbb rbe rbf rbk rbm rbo rbr re- rea reb ree ref rek rem reo rer rfa rfb rfe rff rfk rfm rfo rfr rkb rke rkf rkk rkm rko rma rmb rme rmf rmm rmo rmr roa rob roe rof rok rom roo ror rra rrb rrf rrk rrm rrr

a-ak a-be a-ok aaaa aaab aaae aaaf aaam aaar aaba aabb aabm aaea aaem aafa aafb aaff aaka aake aama aamb aame aamo aamr aaoe aaoo aara aare aarm aaro abaa abab abae abaf abak abam abar abb- abba abbb abbe abbo abbr abee aber abff abma abmb aboa abob abof abok aboo abor abra abro aeaf aeer aeka aeom aer- aera aero afaa afak afam afao afar afee afek afer affa affo afka afkr afma afoa afoe afoo afor afr- afra afre afrm afro akaa akae akam akao akar akee aker akka akko akok akom akr- akra akre amaa amae amam amar amb- amba ambe ambo ambr amee amer amfm amfr amka amm- amma amme ammo amob amof amok amoo amor amra amro aoba aoma aora aorb arab arae araf arak aram arar arba arbe area aree aref arek arem areo arfa arfb arff arka arke arko arma arme armm armo aroa arob aroe arom aroo aror arr- arra arre arrk arro arrr baaa baaf baak baam baar baba babb babe babm babo babr baek baer baff bafo bak- baka bake bako bakr bama bamb bame bamf bamm bar- bara barb bare barf bark barm baro barr bbbb bbeb beaf beak beam bear beba bebb bebe bebo beeb beef beek beem beer befa befe beff befo beka beke beko bema beme beo- beof beok beor bera bere berk berm bero berr bfme bmaa boab boak boar boba bobb bobe bobo boea boee boef boeo boer bofa bofe boff boka boke boko boma bomb bome boob booe boof book boom boor bor- bora bore borf bork borm boro borr brab brae braf brak bram brao brea breb bree bref brek brem breo brer brfm brka brkb broa brob broe brok brom broo bror brrm brrr eaaf eaba eafb eama eame eaom eara earb eare earo ebam ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eefa eefe eeka eeke eemo eera eero efab efbr efeo effa efke efma efor eka- ekab ekam ekeb ekek eker ekka ekma ekoa emae emam emar emba embe embo embr emek emer emma emme emor emra emre eoka eora eore eraf eram erba erbb erbe ereb erem erer erke erma erme ermo erob eroe eroo erra erre erro f--k faaa faam faba fabe fabm fabo faeb faem fafa fafe faff fafo fake fako fama fame famo fara farb fare fark farm faro farr fbar fbom feaf feak feam fear feba febo feeb feek feem feer fefe feff fefo feke feko fema femb feme femm feof fera ferb fere ferk ferm fero ferr ffar ffee ffff ffrr fkab fmea foaf foak foam foar foba foer fofo foke foma fome fomo foof fook foom for- fora forb fore fork form foro forr frab frae frak fram frea free frem freo frob froe from kaaa kaab kaaf kaak kaam kaar kaba kabb kabe kabf kabo kabr kaeo kaer kafa kafe kaff kafm kafr kaka kake kakk kakm kako kam- kama kamb kame kamm kamo kamr kaoa kaok