sctco cstco stcco tscco ctsco tcsco sccto cscto sccto cscto ccsto ccsto stcco tscco sctco cstco tcsco ctsco ctcso tccso cctso cctso tccso ctcso sctoc cstoc stcoc tscoc ctsoc tcsoc scotc csotc soctc osctc costc ocstc stocc tsocc sotcc ostcc toscc otscc ctosc tcosc cotsc octsc tocsc otcsc sccot cscot sccot cscot ccsot ccsot scoct csoct socct oscct cosct ocsct scoct csoct socct oscct cosct ocsct ccost ccost cocst occst cocst occst stcoc tscoc sctoc cstoc tcsoc ctsoc stocc tsocc sotcc ostcc toscc otscc scotc csotc soctc osctc costc ocstc tcosc ctosc tocsc otcsc cotsc octsc ctcos tccos cctos cctos tccos ctcos ctocs tcocs cotcs octcs toccs otccs ccots ccots cocts occts cocts occts tcocs ctocs toccs otccs cotcs octcs
Note: these 'words' (valid or invalid) are all the permutations of the word sctco. These words are obtained by scrambling the letters in sctco.