scein csein secin escin cesin ecsin scien csien sicen iscen cisen icsen seicn esicn siecn isecn eiscn iescn ceisn ecisn ciesn icesn eicsn iecsn sceni cseni secni escni cesni ecsni scnei csnei sncei nscei cnsei ncsei senci esnci sneci nseci ensci nesci censi ecnsi cnesi ncesi encsi necsi scine csine sicne iscne cisne icsne scnie csnie sncie nscie cnsie ncsie since isnce snice nsice insce nisce cinse icnse cnise ncise incse nicse seinc esinc sienc isenc eisnc iesnc senic esnic sneic nseic ensic nesic sinec isnec sniec nsiec insec nisec einsc iensc enisc neisc inesc niesc ceins ecins ciens icens eicns iecns cenis ecnis cneis nceis encis necis cines icnes cnies ncies inces nices eincs iencs enics neics inecs niecs
Note: these 'words' (valid or invalid) are all the permutations of the word scein. These words are obtained by scrambling the letters in scein.