a-be aaaa aaab aaac aaae aaaf aaal aaba aabb aabc aabl aabt aaca aacb aacc aace aacf aacl aact aaea aaec aafa aafb aafc aaff aafl aala aalc aale aall aata aatc aatf aatt abaa abab abac abae abaf abal abat abb- abba abbb abbe abbt abca abcb abcc abcf abcl abct abec abee abel abet abff abla able abta ac-t acaa acab acac acae acat acba acbl acca accc acce accf acct ace- acea acec acel acet acfc acfe acfl acft acla aclc acle acta actc acte actf actl actt aeac aeaf aecb aecl aect aela aelc aeta aetc aetf aett afaa afat afca afcb afcc afee afel afet affa affc afft afla aflc afle afta aftc afte alaa alac alae alal alat alb- alba albc albe alca alcc alce alea alec alee alef alet alfa alfe all- alla alle alll alta alte at-l at-t ataa atab atac atae atal atat atca atcc atcf atcl atea atec atee atef atel atfb atfc atfe atla atle atta atte baaa baaf baal baat baba babb babe bac- baca bacc bace bact bael bafc baff baft bala balc bale balf ball balt bata batc bate batf batt bbbb bbeb bbet bbfc bblb bcaa bcat bcbc bcca bccc bccl bcec bcet bcfc bctc beaf beal beat beba bebb bebe beca beeb beef beel beet befa befe beff beft bela bele bell belt beta betc bete bett bfca bffl bfta bftt blaa blab blac blae blat blbt blea bleb blee blet blfc btaa btaf btcc btcl btec btfc btla bttb caaa caab caac caaf caal caat caba cabe cabf cac- caca cacc cace caec cafa cafb cafc cafe caff cafl cala calc cale calf call calt cat- cata catb catc cate catf catt cbac cbal cbat cbbc cbca cbcc cbce cbcl cbct cbea cbec cbee cbef cbet cbfb cbfc cblb cblc cbta cbtc cbtf cbtl ccaa ccab ccac ccaf ccat ccba ccbc ccca cccb cccc cccf cccl ccee ccel ccfa ccfc ccff ccfl ccla cclc cctb cctc cctl cctt ceac ceal ceat ceba cec- ceca cece cect ceeb ceec ceel cef- cefa cefc cel- cela celc cele celf cell celt cet- ceta cete cfaa cfab cfac cfae cfbc cfbt cfca cfcb cfcf cfcl cffb cfta cftc cfte cftl clab claf clat clea clec clee clef clet cltb cltc ctab ctae ctal ctba ctca ctcf ctec ctfc ctle ctta e-cl e-la eaaf eaba eaca eacc eaec eafb eala ealc eale eata eate ebac ebal ebba ebbc ebcc ebel ebfc ebla ecaa ecac ecal ecat ecbc ecbe ecca eccb eccc ecce eccl ecct ecef ecfa ecfc ecla eclt ect- ecta ectc ectf eeca eeea eeee eefa eefe eefl eele eeta eetc eete efab efca efet effa efla eft- efta el-b elab elac elal elat elba elbe elca elcb elce elea elec elee elef elet elfa elfc elfe elft ella elle elta elte etal etat etbc etcc etec etee etel etfa etfb etfc etfe etla etta ette faaa faac faba fabe faca facc face fact faeb fafa fafc fafe faff fala falc fale fall falt fata fatc fate fatf fatt fbla fble fcab fcal fcat fcba fcca fccf feaf feal feat feba fece fect feeb feel feet fefc fefe feff fela fele felf fell felt feta fete fett ffcc ffee ffff fftf flab flac flae flat flcl flea flee flet ft-c ft-l ftea ftfc ftlb laaa laac laal laat laba labe laca lacc lace lacl lact lael laet lafb lafc lafe laff laft lala lale lall lata latc late latt lbcc lcac lcat lcbc lcca lccc lcce lcfc lctl leaa leaf leal leat leba leca lece lect leea leef leel leet lefa lefe leff left lela lele lell leta lete lett lfat lfca lfcc llat llcc llef llet lllc llll ltac ltae ltbf ltbl ltcc ltee ltfc lttc taa- taaf taal taat taba tabb tabc tabe tabl taca tacc tace tacl tact taec tael tafa tafc tafe taff taft tala talc tale tall tata tatb tate tatt tbaf tbca tbcb tbcc tbce tbta tcca tccc tcfc tctc teac teal teat teba teca tecl tect teec teef teel teet tefc teff tefl teft tel- tela telc tele tell telt teta tete tett tfae tfal tfca tfeb tfec tftc tlac ttab ttbb ttfa ttfc ttff tttt