aaaa aaac aaae aaar aaca aacc aace aacr aact aaea aaec aara aarc aare aart aata aatc aatt ac-t acaa acac acae acar acat acca accc acce acct ace- acea acec acer acet acr- acra acrc acre acrr acta actc acte actt aeac aect aeer aer- aera aerc aeta aetc aetr aett aetx arac arae arar arat arax arc- arca arce arct area arec aree aret arex arr- arra arrc arre arrr arrt arta artc arte artr artx at-t at-x ataa atac atae atar atat atax atca atcc atcr atea atec atee ater atex atra atrc atre atrx atta atte attr axar axat axce axer caaa caac caat cac- caca cacc cace cacr caec caer caex cara carc care carr cart carx cat- cata catc cate catt caxa ccaa ccac ccar ccat ccca cccc ccee ccra ccrc ccre ccrt cctc cctt ceac cear ceat cec- ceca cece cect ceec cer- cera cerc cere cert cet- ceta cete cexe crac crar crat crax crca crcc crce crcr cre- crea crec cree cret crex crrt crtc ctae ctca ctec ctrc ctta cxxx eaca eacc eaec eara eare eart eata eate ecaa ecac ecar ecat ecca eccc ecce ecct ecra ecrc ecrr ect- ecta ectc eeca eeea eeee eera eerc eeta eetc eete eext er-x erat erca ercc erce erec erer eret erra errc erre erta etat etcc etec etee eter etra etre etta ette exa- exec exer exrx exta exte extr raat rac- raca racc race ract raec raer rara rare rata rate ratt raxa rcac rccc rcet rctc rea- reac reae rear reat reca recc rece recr rect reet rera rere rert reta rete retr rett rexx rrat rrrr rtca rtcc rtce rtee rtex taa- taar taat taca tacc tace tact taec taer tara tarc tare tarr tart tata tate tatr tatt tax- taxa taxe taxt tcca tccc tctc teac tear teat teca tecr tect teec teer teet ter- tera terc tere terr teta tete tetr tett tetx texa text traa trac trae trat trax trca trcc tre- trea trec tree tret trex trra trtc trte trtr tter tttt txaa txtr xaar xace xact xara xare xate xcat xeer xer- xera xert xexe xtar xtea xtra xxxx