a-ak a-be aaaa aaab aaac aaae aaal aaba aabb aabc aabl aabt aaca aacb aacc aace aack aacl aact aaea aaec aaka aake aala aalc aale aall aata aatc aatk aatt abaa abab abac abae abak abal abat abb- abba abbb abbe abbt abca abcb abcc abcl abct abec abee abel abet abla able abta ac-t acaa acab acac acae acat acba acbl acca accc acce acct ace- acea acec acek acel acet acke acla aclc acle acta actc acte actl actt aeac aecb aecl aect aeka aela aelc aeta aetc aett akaa akae akal akca akee akel akka akle akte alaa alac alae alak alal alat alb- alba albc albe alca alcc alce alea alec alee alek alet alk- alka alkb alke all- alla alle alll alta alte at-l at-t ataa atab atac atae atak atal atat atca atcc atck atcl atea atec atee atel atka atkt atla atle atta atte baaa baak baal baat baba babb babe bac- baca bacc bace back bact baek bael bak- baka bake bakl bakt bala balc bale balk ball balt bata batc bate batt bbbb bbeb bbet bblb bcaa bcat bcbc bcca bccc bccl bcec bcet bctc beak beal beat beba bebb bebe beca beck beeb beek beel beet beka beke bela bele belk bell belt beta betc bete bett blaa blab blac blae blak blat blbt blea bleb blee blek blet blkb btaa btcc btcl btec btek btla bttb caaa caab caac caal caat caba cabe cac- caca cacc cace cack caec caka cake cala calc cale calk call calt cat- cata catb catc cate catt cbac cbal cbat cbbc cbca cbcc cbce cbcl cbct cbea cbec cbee cbet cbka cbkl cblb cblc cbta cbtc cbtl ccaa ccab ccac ccat ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc cctb cctc cctl cctt ceac ceal ceat ceba cec- ceca cece cect ceeb ceec ceel ceke cel- cela celc cele cell celt cet- ceta cete ckac ckat ckbc ckbe ckck ckcl cktb clab clat clea clec clee clek clet cltb cltc ctab ctae ctal ctba ctca ctec ctle ctta e-cl e-la eaba eaca eacc eaec eala ealc eale eata eate ebac ebal ebba ebbc ebcc ebel ebla ecaa ecac ecal ecat ecbc ecbe ecca eccb eccc ecce eccl ecct ecka ecla eclt ect- ecta ectc eeca eeea eeee eeka eeke eele eeta eetc eete eka- ekab ekeb ekek eket ekka ekta el-b elab elac elal elat elba elbe elca elcb elce elea elec elee elek elet elka elke ella elle elta elte etak etal etat etbc etcc etec etee etel etka etla etta ette kaaa kaab kaak kaal kaat kaba kabb kabc kabe kacb kacc kace kacl kact kael kaet kaka kakc kake kakk kakt kala kalb kalc kale kalk kall kalt kat- kata katb katc kate katk katl katt kbaa kbab kbac kbae kbak kbal kbat kbba kbbb kbbc kbbe kbbk kbbl kbbt kbca kbcb kbce kbck kbcl kbct kbeb kbec kbee kbek kbel kbet kbkb kbkk kbkl kbla kblb kble kbll kblt kbta kbtb kbtc kbte kbtk kbtl kbtt kcaa kcab kcac kcal kcat kcba kcbc kcbk kcbl kcca kccb kccc kcck kccl kcct kcea kceb kcec kcee kcel kcet kckc kckk kckl kcla kclc kcle kclk kcll kclt kcta kctb kctc kcte kea- keak keal keat keba kebb kebc kebe kebt keca keck keek keel keet keka kekb kekc keke kekl kela kele kelk kell kelt ket- keta ketc kete ketk kett kkaa kkac kkal kkat kkba kkbb kkbe kkbl kkbt kkcb kkck kkcl kkct kkea kkkk kklb kklc kkll kktc kktk kktl klaa klab klac klak klal klat klbb klbc klbe klbl klbt klca klcb klcc klce klck klcl klea kleb klec klee klek klet klka klkc klkk klkl klla kllb kllc klle kllk kltc kltk kltt ktaa ktae ktak ktal ktat ktba ktbb ktbc ktbl ktbt ktcc ktce ktck ktcl ktea ktec ktee ktek ktel ktkb ktkc ktke ktkk ktkt ktla ktlb ktlk ktlt kttc kttk kttt laaa laac laak laal laat laba labe laca lacc lace lack lacl lact lael laet laka lake lala lale lall lata latc late latt lbcc lcac lcat lcbc lcca lccc lcce lctl leaa leak leal leat leba leca lece leck lect leea leek leel leet leka leke lekk lela lele lell leta lete lett lkab lkal llat llcc llet lllc llll ltac ltae ltbl ltcc ltee ltke lttc taa- taal taat taba tabb tabc tabe tabl taca tacc tace tack tacl tact taec tael taka take takk takt tala talc tale talk tall tata tatb tate tatt tbca tbcb tbcc tbce tbta tcca tccc tctc teac teak teal teat teba teca teck tecl tect teec teek teel teet teka teke tel- tela telc tele tell telt teta tete tett tkac tlac ttab ttbb tttt