etpcu tepcu eptcu petcu tpecu ptecu etcpu tecpu ectpu cetpu tcepu ctepu epctu pectu ecptu ceptu pcetu cpetu tpceu ptceu tcpeu ctpeu pcteu cpteu etpuc tepuc eptuc petuc tpeuc pteuc etupc teupc eutpc uetpc tuepc utepc eputc peutc euptc ueptc puetc upetc tpuec ptuec tupec utpec putec uptec etcup tecup ectup cetup tceup cteup etucp teucp eutcp uetcp tuecp utecp ecutp ceutp euctp uectp cuetp ucetp tcuep ctuep tucep utcep cutep uctep epcut pecut ecput ceput pceut cpeut epuct peuct eupct uepct puect upect ecupt ceupt eucpt uecpt cuept ucept pcuet cpuet pucet upcet cupet ucpet tpcue ptcue tcpue ctpue pctue cptue tpuce ptuce tupce utpce putce uptce tcupe ctupe tucpe utcpe cutpe uctpe pcute cpute pucte upcte cupte ucpte
Note: these 'words' (valid or invalid) are all the permutations of the word etpcu. These words are obtained by scrambling the letters in etpcu.