nsecu snecu nescu enscu sencu esncu nsceu snceu ncseu cnseu scneu csneu necsu encsu ncesu cnesu ecnsu censu secnu escnu scenu csenu ecsnu cesnu nseuc sneuc nesuc ensuc senuc esnuc nsuec snuec nusec unsec sunec usnec neusc enusc nuesc unesc eunsc uensc seunc esunc suenc usenc eusnc uesnc nscue sncue ncsue cnsue scnue csnue nsuce snuce nusce unsce sunce usnce ncuse cnuse nucse uncse cunse ucnse scune csune sucne uscne cusne ucsne necus encus nceus cneus ecnus cenus neucs enucs nuecs unecs euncs uencs ncues cnues nuces unces cunes ucnes ecuns ceuns eucns uecns cuens ucens secun escun sceun cseun ecsun cesun seucn esucn suecn usecn euscn uescn scuen csuen sucen uscen cusen ucsen ecusn ceusn eucsn uecsn cuesn ucesn
Note: these 'words' (valid or invalid) are all the permutations of the word nsecu. These words are obtained by scrambling the letters in nsecu.