a-be aaaa aaab aaac aaae aaal aaar aaba aabb aabc aabl aabt aaca aacb aacc aace aacl aacr aact aaea aaec aala aalc aale aall aara aarc aare aart aata aatc aatt abaa abab abac abae abal abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcl abcr abct abec abee abel aber abet abla able abra abrc abta ac-t acaa acab acac acae acar acat acba acbl acca accc acce acct ace- acea acec acel acer acet acla aclc acle aclr acr- acra acrc acre acrr acta actc acte actl actt aeac aecb aecl aect aeer aela aelc aer- aera aerc aeta aetc aetr aett alaa alac alae alal alar alat alb- alba albc albe alca alcc alce alea alec alee aler alet all- alla alle alll allr alta alte arab arac arae aral arar arat arba arbe arc- arca arce arct area arec aree arel aret arla arle arr- arra arrc arre arrr arrt arta artc arte artr at-l at-t ataa atab atac atae atal atar atat atca atcc atcl atcr atea atec atee atel ater atla atle atra atrc atre atta atte attr baaa baal baar baat baba babb babe babr bac- baca bacc bace bact bael baer bala balc bale ball balt bar- bara barb barc bare barr bart bata batc bate batt bbbb bbeb bbet bblb bbrc bcaa bcar bcat bcbc bcca bccc bccl bcec bcer bcet bcra bctc beal bear beat beba bebb bebe beca beeb beel beer beet bela bele bell belt bera berc bere berr bert beta betc bete bett blaa blab blac blae blat blbt blea bleb blee blet blrc brab brac brae brat brca brcb brce brea breb brec bree brel brer bret brrr brtc btaa btcc btcl btec btla btrc btrt bttb caaa caab caac caal caat caba cabe cac- caca cacc cace cacr caec caer cala calc cale call calt cara carb carc care carl carr cart cat- cata catb catc cate catt cbac cbal cbar cbat cbbc cbca cbcc cbce cbcl cbcr cbct cbea cbec cbee cber cbet cblb cblc cbre cbrl cbrt cbta cbtc cbtl ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc ccra ccrc ccre ccrl ccrt cctb cctc cctl cctt ceac ceal cear ceat ceba cec- ceca cece cect ceeb ceec ceel cel- cela celc cele cell celt cer- cera cerc cere cerl cert cet- ceta cete clab clar clat clea clec clee cler clet clra cltb cltc crab crac crar crat crbc crca crcc crce crcr cre- crea creb crec cree cret crrt crtc crtl ctab ctae ctal ctba ctca ctec ctle ctrc ctrl ctta e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl eart eata eate ebac ebal ebba ebbc ebbr ebcc ebel eber ebla ecaa ecac ecal ecar ecat ecbc ecbe ecca eccb eccc ecce eccl ecct ecla eclt ecra ecrc ecrl ecrr ect- ecta ectc eeca eeea eeee eele eera eerc eeta eetc eete el-b elab elac elal elar elat elba elbe elca elcb elce elea elec elee eler elet ella elle elra elta elte eral erat erba erbb erbe erca ercc erce ereb erec erel erer eret erla erle erll erra errc erre erta ertl etal etat etbc etbr etcc etec etee etel eter etla etra etre etta ette laaa laac laal laar laat laba labe labr laca lacc lace lacl lact lael laer laet lala lale lall lara larb larc lare larr lart lata latc late latt lbar lbcc lblr lbrt lcac lcat lcbc lcca lccc lcce lcer lcra lcrl lctl leaa leal lear leat leba leca lece lect leea leel leer leet lela lele lell lera lerc lere lert leta lete lett llat llcc llet lllc llll lrac lral lrat lrba lrrc lrrr lrta ltac ltae ltbl ltcc ltee ltra lttc lttr raab raat raba rabb rabe rabl rac- raca racc race ract raec rael raer rala ralb rale rall ralt rara rarb rare rata rate ratt rbbb rbbr rbcl rble rcac rcbc rccb rccc rcet rcle rctc rea- reac reae real rear reat reba rebb rebe reca recc rece recr rect reeb reel reet rela relb rele rell relt rera rere rert reta rete retr rett rlab rlee rrat rrle rrrr rtca rtcc rtce rtee rtle rtlt taa- taal taar taat taba tabb tabc tabe tabl taca tacc tace tacl tact taec tael taer tala talc tale tall tara tarb tarc tare tarr tart tata tatb tate tatr tatt tbar tbca tbcb tbcc tbce tbrb tbta tcca tccc tctc teac teal tear teat teba teca tecl tecr tect teec teel teer teet tel- tela telc tele tell telt ter- tera terc tere terr teta tete tetr tett tlac traa trab trac trae tral trat trca trcc trcl tre- trea trec tree tret trra trtc trte trtr ttab ttbb tter tttt