duces udces dcues cdues ucdes cudes duecs udecs deucs educs uedcs eudcs dceus cdeus decus edcus cedus ecdus uceds cueds uecds eucds ceuds ecuds ducse udcse dcuse cduse ucdse cudse dusce udsce dsuce sduce usdce sudce dcsue cdsue dscue sdcue csdue scdue ucsde cusde uscde sucde csude scude duesc udesc deusc edusc uedsc eudsc dusec udsec dsuec sduec usdec sudec desuc edsuc dseuc sdeuc esduc seduc uesdc eusdc usedc suedc esudc seudc dcesu cdesu decsu edcsu cedsu ecdsu dcseu cdseu dsceu sdceu csdeu scdeu descu edscu dsecu sdecu esdcu sedcu cesdu ecsdu csedu scedu escdu secdu ucesd cuesd uecsd eucsd ceusd ecusd ucsed cused usced suced csued scued uescd euscd usecd suecd esucd seucd cesud ecsud cseud sceud escud secud
Note: these 'words' (valid or invalid) are all the permutations of the word duces. These words are obtained by scrambling the letters in duces.