ntcsa tncsa nctsa cntsa tcnsa ctnsa ntsca tnsca nstca sntca tsnca stnca ncsta cnsta nscta sncta csnta scnta tcsna ctsna tscna stcna cstna sctna ntcas tncas nctas cntas tcnas ctnas ntacs tnacs natcs antcs tancs atncs ncats cnats nacts ancts cants acnts tcans ctans tacns atcns catns actns ntsac tnsac nstac sntac tsnac stnac ntasc tnasc natsc antsc tansc atnsc nsatc snatc nastc anstc santc asntc tsanc stanc tasnc atsnc satnc astnc ncsat cnsat nscat sncat csnat scnat ncast cnast nacst ancst canst acnst nsact snact nasct ansct sanct asnct csant scant casnt acsnt sacnt ascnt tcsan ctsan tscan stcan cstan sctan tcasn ctasn tacsn atcsn catsn actsn tsacn stacn tascn atscn satcn astcn csatn scatn castn acstn sactn asctn
Note: these 'words' (valid or invalid) are all the permutations of the word ntcsa. These words are obtained by scrambling the letters in ntcsa.