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