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