atocs taocs aotcs oatcs toacs otacs atcos tacos actos catos tcaos ctaos aocts oacts acots caots ocats coats tocas otcas tcoas ctoas octas cotas atosc taosc aotsc oatsc toasc otasc atsoc tasoc astoc satoc tsaoc staoc aostc oastc asotc saotc osatc soatc tosac otsac tsoac stoac ostac sotac atcso tacso actso catso tcaso ctaso atsco tasco astco satco tsaco staco acsto casto ascto sacto csato scato tcsao ctsao tscao stcao cstao sctao aocst oacst acost caost ocast coast aosct oasct asoct saoct osact soact acsot casot ascot sacot csaot scaot ocsat cosat oscat socat csoat scoat tocsa otcsa tcosa ctosa octsa cotsa tosca otsca tsoca stoca ostca sotca tcsoa ctsoa tscoa stcoa cstoa sctoa ocsta costa oscta socta csota scota
Note: these 'words' (valid or invalid) are all the permutations of the word atocs. These words are obtained by scrambling the letters in atocs.