grunt rgunt gurnt ugrnt rugnt urgnt grnut rgnut gnrut ngrut rngut nrgut gunrt ugnrt gnurt ngurt ungrt nugrt rungt urngt rnugt nrugt unrgt nurgt grutn rgutn gurtn ugrtn rugtn urgtn grtun rgtun gtrun tgrun rtgun trgun gutrn ugtrn gturn tgurn utgrn tugrn rutgn urtgn rtugn trugn utrgn turgn grntu rgntu gnrtu ngrtu rngtu nrgtu grtnu rgtnu gtrnu tgrnu rtgnu trgnu gntru ngtru gtnru tgnru ntgru tngru rntgu nrtgu rtngu trngu ntrgu tnrgu guntr ugntr gnutr ngutr ungtr nugtr gutnr ugtnr gtunr tgunr utgnr tugnr gntur ngtur gtnur tgnur ntgur tngur untgr nutgr utngr tungr ntugr tnugr runtg urntg rnutg nrutg unrtg nurtg rutng urtng rtung trung utrng turng rntug nrtug rtnug trnug ntrug tnrug untrg nutrg utnrg tunrg nturg tnurg
Note: these 'words' (valid or invalid) are all the permutations of the word grunt. These words are obtained by scrambling the letters in grunt.