-er a-a a-b a-c aaa aab aac aae aaf aan aar ab- aba abb abc abe abf abn abr ac- aca acb acc ace acf acn acr aea aeb aec aee aef aen aer af- afa afb afc afe aff afn afr an- ana anb anc ane anf ann anr ar- ara arb arc are arf arn arr baa bab bac bae baf ban bar bba bbb bbc bbe bbf bbn bbr bca bcb bcc bce bcf bcn bcr be- bea beb bec bee bef ben ber bfa bfb bfc bfe bff bfn bfr bna bnb bnc bne bnf bnn bnr bra brb bre brf brn brr c-- caa cab cac cae caf can car cba cbb cbc cbe cbf cbn cbr cca ccb ccc cce ccf ccn ccr ce- cea ceb cec cee cef cen cer cfa cfb cfc cfe cff cfn cfr cn- cna cnb cnc cne cnf cnn cnr cra crb crc cre crf crn crr eaa eab eac eae eaf ean ear eba ebb ebc ebe ebf ebn ebr ec- eca ecb ecc ece ecf ecn ecr eea eeb eec eee eef een eer ef- efa efb efc efe eff efr en- ena enb enc ene enf enn enr era erb erc ere erf ern err faa fab fac fae faf fan far fba fbb fbc fbe fbf fbn fbr fca fcb fcc fce fcf fcn fcr fea feb fec fee fef fen fer ffa ffc ffe fff ffn ffr fna fnb fnc fne fnf fnn fnr fra frb frc fre frf frn frr naa nab nac nae naf nan nar nba nbb nbc nbe nbf nbn nbr nca ncb ncc nce ncf ncn ncr ne- nea neb nec nee nef nen ner nfa nfb nfc nfe nff nfn nfr nna nnb nnc nne nnf nnn nra nrb nrc nre nrf nrn nrr ra- raa rab rac rae raf ran rar rba rbb rbc rbe rbf rbn rbr rca rcb rcc rce rcf rcn rcr re- rea reb rec ree ref ren rer rfa rfb rfc rfe rff rfn rfr rna rnb rnc rnn rnr rra rrb rrc rrf rrn rrr

-ana -ane -ene a-be aaaa aaab aaac aaae aaaf aaan aaar aaba aabb aabc aaca aacb aacc aace aacf aacn aacr aaea aaec aaen aafa aafb aafc aaff aana aane aara aarc aare abaa abab abac abae abaf aban abar abb- abba abbb abbe abbr abca abcb abcc abcf abcn abcr abec abee aben aber abff abra abrc acaa acab acac acae acan acar acba acca accc acce accf ace- acea acec acen acer acfc acfe acne acr- acra acrc acre acrr aeac aeaf aean aebn aecb aeer aena aer- aera aerc afaa afan afar afca afcb afcc afee afer affa affc afr- afra afrc afre ana- anaa anab anac anae anan anar anba anbb anca ancc ance anec anee anen aner anfa anna annb anne anrc arab arac arae araf aran arar arba arbe arc- arca arce area arec aree aref aren arfa arfb arfc arff arna arne arr- arra arrc arre arrr baaa baaf baan baar baba babb babe babr bac- baca bacc bace bacn baer bafc baff bana banc bane bann banr bar- bara barb barc bare barf barn barr bbbb bbeb bbfc bbfn bbrc bcaa bcar bcbc bcca bccc bcec bcer bcfc bcra beaf bean bear beba bebb bebe beca beeb beef been beer befa befe beff bena bene benn bera berc bere bern berr bfca bner bnrr brab brac brae braf bran brca brcb brce brea breb brec bree bref bren brer brfc brna brrr caaa caab caac caaf caan caba cabe cabf cac- caca cacc cace cacr caec caen caer cafa cafb cafc cafe caff cana canc cane cann cara carb carc care carf carn carr cbac cbar cbbc cbca cbcc cbce cbcn cbcr cbea cbec cbee cbef cber cbfb cbfc cbna cbre cbrn ccaa ccab ccac ccaf ccar ccba ccbc ccbn ccca cccb cccc cccf ccee ccfa ccfc ccff ccna ccnb ccnc ccne ccnf ccnr ccra ccrc ccre ccrf ceac cean cear ceba cec- ceca cece ceeb ceec cef- cefa cefc cefn cen- cena cene cer- cera cerc cere cerf cern cfaa cfab cfac cfae cfar cfbc cfbn cfbr cfca cfcb cfcf cfcn cffb cffr cfnb cfnr cfra cfrb cfre cfrn cnaa cnac cnbc cnfa cnna cnrc cnrr crab crac craf cran crar crbc crca crcc crce crcr cre- crea creb crec cree cren crfc crna crne eaaf eaba eaca eacc eaec eafb eana eara earb eare earn ebac eban ebba ebbc ebbr ebcc eben eber ebfc ecaa ecac ecan ecar ecbc ecbe ecca eccb eccc ecce ecef ecfa ecfc ecfr ecne ecra ecrc ecrf ecrr eeca eeea eeee eefa eefe eefn eena eera eerc efab efbr efca efen effa enab enac enan enb- enbn enbr enca ence enea enee ener enfb enna ennc enne enra eraf eran erba erbb erbe erca ercc erce ereb erec eren erer erfc erna erne erra errc erre faaa faac faan faba fabe faca facc face faeb fafa fafc fafe faff fana fanc fane fara farb farc fare farr fbar fcab fcar fcba fcca fccf fcra feaf fean fear feba fece feeb feen feer fefc fefe feff fena fene fenn fera ferb ferc fere fern ferr ffar ffcc ffee ffff ffrr fnac fnar frab frac frae fran frbc frcc frcn frea free fren frfc naaa naab naac naan naar naba nabc nabe nabf naca nacc nace nacf naea naef nafa nafc nafe naff nan- nana nanb nane nann nara narc nare narf narn narr nbaa nbaf nbar nbbc nbca nbcc nber nbfa nbfc ncaa ncac ncar ncba ncbc ncca nccc nccf nccn nccr ncea ncec ncee ncef ncen ncer ncfc ncfe ncna ncnc ncra ncrc ncre neab neac neaf nean near neba nebb nebe nebn nebr neca necc nece necr neea neeb neef neen neer nefa nefe neff nena nene nera nerc nere nerf nerr nfaa nfer nfff nfra nnnn nrab nrca nren nrfc nrna nrrc raab raaf raan raba rabb rabe