-ana -ane -ene a-ak a-be aaaa aaab aaac aaae aaaf aaan aaba aabb aabc aaca aacb aacc aace aacf aack aacn aaea aaec aaen aafa aafb aafc aaff aaka aake aana aane abaa abab abac abae abaf abak aban abb- abba abbb abbe abca abcb abcc abcf abcn abec abee aben abff acaa acab acac acae acan acba acca accc acce accf ace- acea acec acek acen acfc acfe acke acne aeac aeaf aean aebn aecb aeka aena afaa afak afan afca afcb afcc afee afek affa affc afka akaa akae akan akca akee aken akka akna ana- anaa anab anac anae anak anan anba anbb anca ancc ance anec anee anen anfa ank- anka anke anna annb anne baaa baaf baak baan baba babb babe bac- baca bacc bace back bacn baek bafc baff bak- baka bake bana banc bane bank bann bbbb bbeb bbfc bbfn bcaa bcbc bcca bccc bcec bcfc beaf beak bean beba bebb bebe beca beck beeb beef beek been befa befe beff beka beke bena bene benk benn bfca caaa caab caac caaf caan caba cabe cabf cac- caca cacc cace cack caec caen cafa cafb cafc cafe caff caka cake cana canc cane cank cann cbac cbbc cbca cbcc cbce cbcn cbea cbec cbee cbef cbfb cbfc cbka cbkn cbna ccaa ccab ccac ccaf ccba ccbc ccbn ccca cccb cccc cccf ccee ccfa ccfc ccff ccna ccnb ccnc ccne ccnf ceac cean ceba cec- ceca cece ceeb ceec cef- cefa cefc cefn ceke cen- cena cene cfaa cfab cfac cfae cfbc cfbn cfca cfcb cfcf cfcn cffb cfnb ckac ckan ckbc ckbe ckck cken cknb cknc cnaa cnac cnbc cnfa cnna eaaf eaba eaca eacc eaec eafb eana ebac eban ebba ebbc ebcc eben ebfc ecaa ecac ecan ecbc ecbe ecca eccb eccc ecce ecef ecfa ecfc ecka ecne eeca eeea eeee eefa eefe eefn eeka eeke eena efab efca efen effa efke eka- ekab ekeb ekek eken ekfc ekka ekne enab enac enan enb- enbn enca ence enea enee enfb enka enke enna ennc enne f--k faaa faac faan faba fabe faca facc face fack faeb fafa fafc fafe faff fake fana fanc fane fank fcab fcba fcca fccf feaf feak fean feba fece feck feeb feek feen fefc fefe feff feke fena fene fenk fenn ffcc ffee ffff fkab fnac kaaa kaab kaaf kaak kaan kaba kabb kabc kabe kabf kacb kacc kace kafa kafc kafe kaff kafn kaka kakc kake kakk kakn kana kanb kane kanf kann kbaa kbab kbac kbae kbak kbba kbbb kbbc kbbe kbbf kbbk kbca kbcb kbce kbck kbeb kbec kbee kbef kbek kben kbfb kbfc kbff kbfk kbkb kbkf kbkk kbna kbnn kcaa kcab kcac kcba kcbc kcbf kcbk kcca kccb kccc kcck kcea kceb kcec kcee kcfa kcfb kcfc kcfn kckc kckf kckk kckn kcnb kea- keak kean keba kebb kebc kebe kebn keca keck keef keek keen kefa kefb kefc keff keka kekb kekc keke ken- kena kene kenk kenn kfab kfac kfan kfbc kfbk kfbn kfcf kfeb kffa kffb kfff kffk kffn kfka kfkb kfna kfnc kfnf kfnk kfnn kkaa kkac kkan kkba kkbb kkbe kkbn kkcb kkck kkcn kkea kken kkfn kkkk kknb kkne kknn knaa knab knac knaf knan knba knbb knbc knbe knbn knca kncb knce knck kncn knea kneb knec knee knef knek knen knfa knkk knnb knnk naaa naab naac naan naba nabc nabe nabf nabk naca nacc nace nacf nack naea naef nafa nafc nafe naff naka nake nan- nana nanb nane nann nbaa nbaf nbak nbbc nbca nbcc nbfa nbfc ncaa ncac ncba ncbc ncca nccc nccf nccn ncea ncec ncee ncef ncen ncfc ncfe ncna ncnc neab neac neaf nean neba nebb nebe nebn neca necc nece neck neea neeb neef neen nefa nefe neff neka neke nena nene nfaa nfff nkfc nnnn