crues rcues cures ucres ruces urces creus rceus cerus ecrus recus ercus cuers ucers ceurs ecurs uecrs eucrs ruecs urecs reucs erucs uercs eurcs cruse rcuse curse ucrse rucse urcse crsue rcsue csrue scrue rscue srcue cusre ucsre csure scure uscre sucre rusce ursce rsuce sruce usrce surce cresu rcesu cersu ecrsu recsu ercsu crseu rcseu csreu screu rsceu srceu cesru ecsru cseru sceru escru secru rescu erscu rsecu srecu esrcu sercu cuesr ucesr ceusr ecusr uecsr eucsr cuser ucser csuer scuer uscer sucer cesur ecsur cseur sceur escur secur uescr euscr usecr suecr esucr seucr ruesc uresc reusc erusc uersc eursc rusec ursec rsuec sruec usrec surec resuc ersuc rseuc sreuc esruc seruc uesrc eusrc userc suerc esurc seurc
Note: these 'words' (valid or invalid) are all the permutations of the word crues. These words are obtained by scrambling the letters in crues.