cteis tceis cetis ectis tecis etcis cties tcies cites ictes tices itces ceits ecits ciets icets eicts iects teics etics tiecs itecs eitcs ietcs ctesi tcesi cetsi ectsi tecsi etcsi ctsei tcsei cstei sctei tscei stcei cesti ecsti cseti sceti escti secti tesci etsci tseci steci estci setci ctise tcise citse ictse ticse itcse ctsie tcsie cstie sctie tscie stcie ciste icste csite scite iscte sicte tisce itsce tsice stice istce sitce ceist ecist ciest icest eicst iecst cesit ecsit cseit sceit escit secit ciset icset csiet sciet iscet sicet eisct iesct esict seict isect siect teisc etisc tiesc itesc eitsc ietsc tesic etsic tseic steic estic setic tisec itsec tsiec stiec istec sitec eistc iestc esitc seitc isetc sietc
Note: these 'words' (valid or invalid) are all the permutations of the word cteis. These words are obtained by scrambling the letters in cteis.