-er a-a a-b aaa aab aae aaf aak aan aar ab- aba abb abe abf abk abn abr aea aeb aee aef aek aen aer af- afa afb afe aff afk afn afr aka akb ake akk akn akr an- ana anb ane anf ank ann anr ar- ara arb are arf ark arn arr baa bab bae baf bak ban bar bba bbb bbe bbf bbk bbn bbr be- bea beb bee bef bek ben ber bfa bfb bfe bff bfn bfr bka bkb bke bkf bkk bkn bkr bna bnb bne bnf bnk bnn bnr bra brb bre brf brk brn brr eaa eab eae eaf eak ean ear eba ebb ebe ebf ebk ebn ebr eea eeb eee eef eek een eer ef- efa efb efe eff efr eka ekb eke ekf ekr en- ena enb ene enf enk enn enr era erb ere erf erk ern err faa fab fae faf fak fan far fba fbb fbe fbf fbk fbn fbr fea feb fee fef fek fen fer ffa ffe fff ffk ffn ffr fka fkb fkf fkk fna fnb fne fnf fnk fnn fnr fra frb fre frf frk frn frr ka- kaa kab kae kaf kak kan kar kba kbb kbe kbf kbk kbn kbr ke- kea keb kee kef kek ken ker kfa kff kkb kke kkk kkn kkr kn- kna kne knf knk knn knr kra krf krk krn krr naa nab nae naf nak nan nar nba nbb nbe nbf nbk nbn nbr ne- nea neb nee nef nek nen ner nfa nfb nfe nff nfk nfn nfr nka nke nkf nkk nkn nkr nna nnb nne nnf nnk nnn nra nrb nre nrf nrk nrn nrr ra- raa rab rae raf rak ran rar rba rbb rbe rbf rbk rbn rbr re- rea reb ree ref rek ren rer rfa rfb rfe rff rfk rfn rfr rkb rke rkf rkk rna rnb rnn rnr rra rrb rrf rrk rrn rrr

-ana -ane -ene a-ak a-be aaaa aaab aaae aaaf aaan aaar aaba aabb aaea aaen aafa aafb aaff aaka aake aana aane aara aare abaa abab abae abaf abak aban abar abb- abba abbb abbe abbr abee aben aber abff abra aeaf aean aebn aeer aeka aena aer- aera afaa afak afan afar afee afek afer affa afka afkr afr- afra afre akaa akae akan akar akee aken aker akka akna akr- akra akre ana- anaa anab anae anak anan anar anba anbb anee anen aner anfa ank- anka anke anna annb anne arab arae araf arak aran arar arba arbe area aree aref arek aren arfa arfb arff arka arke arna arne arnk arr- arra arre arrk arrr baaa baaf baak baan baar baba babb babe babr baek baer baff bak- baka bake bakr bana bane bank bann banr bar- bara barb bare barf bark barn barr bbbb bbeb bbfn beaf beak bean bear beba bebb bebe beeb beef beek been beer befa befe beff beka beke bena bene benk benn bera bere berk bern berr bner bnrr brab brae braf brak bran brea breb bree bref brek bren brer brka brkb brna brrr eaaf eaba eafb eana eara earb eare earn eban ebba ebbr eben eber eeea eeee eefa eefe eefn eeka eeke eena eera efab efbr efen effa efke eka- ekab ekeb ekek eken eker ekka ekne enab enan enb- enbn enbr enea enee ener enfb enka enke enkr enna enne enra eraf eran erba erbb erbe ereb eren erer erke erna erne erra erre f--k faaa faan faba fabe faeb fafa fafe faff fake fana fane fank fara farb fare fark farr fbar feaf feak fean fear feba feeb feek feen feer fefe feff feke fena fene fenk fenn fera ferb fere ferk fern ferr ffar ffee ffff ffrr fkab fnar frab frae frak fran frea free fren kaaa kaab kaaf kaak kaan kaar kaba kabb kabe kabf kabr kaer kafa kafe kaff kafn kafr kaka kake kakk kakn kana kanb kane kanf kann kara karb kare karf kark karn karr kbaa kbab kbae kbak kbar kbba kbbb kbbe kbbf kbbk kbbr kbeb kbee kbef kbek kben kber kbfb kbff kbfk kbfr kbkb kbkf kbkk kbkr kbna kbnn kbnr kbra kbrb kbre kbrf kbrk kbrn kea- keak kean kear keba kebb kebe kebn kebr keef keek keen keer kefa kefb keff kefr keka kekb keke ken- kena kene kenk kenn kenr ker- kera kerb kere kerf kerk kern kerr kfab kfan kfar kfbk kfbn kfeb kfer kffa kffb kfff kffk kffn kfka kfkb kfna kfnf kfnk kfnn kfra kfre kfrn kfrr kkaa kkan kkar kkba kkbb kkbe kkbn kkbr kkea kken kkfn kkfr kkkk kknb kkne kknn kkrb kkre kkrf kkrk kkrn kkrr knaa knab knaf knan knar knba knbb knbe knbn knbr knea kneb knee knef knek knen knfa knfr knkk knnb knnk knnr knrb knrk krab krae krak kran krar krba krbb krbe krbk krbr krea kreb kree kref krek kren krfe krff krfn krka krke krkk krkn krkr krna krnb krne krnk krnn krrb krre krrf krrk krrn krrr naaa naab naan naar naba nabe nabf nabk naea naef nafa nafe naff naka nake nan- nana nanb nane nann nara nare narf nark narn narr nbaa nbaf nbak nbar nber nbfa neab neaf nean near neba nebb nebe nebn nebr neea neeb neef neen neer nefa nefe neff neka neke nena nene nera nere nerf nerk nerr nfaa nfer nfff nfra nkrf nnnn nrab nren nrna raab raaf raak raan raba rabb rabe rabk raef raen raer rafa rafe raff raka rake rakk rana rane rank rann rara rarb rare rarf rark rbaf rbbb rbbr rea- reae reaf reak rean rear reba rebb rebe rebk reeb reef reek reen refe reff refn refr reka reke rena rene renk renn rera rere rfae rfef rkkf rnaf rnbr rrna rrrr

-aaa- aaaee aabaa aabba aabra aaeaf aaker aakre aarna aarne abaab ababa ababe abaer abaka abake abana abank abann abara abare abarn abban abbar abean