gnudi ngudi gundi ugndi nugdi ungdi gndui ngdui gdnui dgnui ndgui dngui gudni ugdni gduni dguni udgni dugni nudgi undgi ndugi dnugi udngi dungi gnuid nguid gunid ugnid nugid ungid gniud ngiud ginud ignud nigud ingud guind ugind giund igund uignd iugnd nuigd unigd niugd inugd uingd iungd gndiu ngdiu gdniu dgniu ndgiu dngiu gnidu ngidu gindu igndu nigdu ingdu gdinu dginu gidnu igdnu dignu idgnu ndigu dnigu nidgu indgu dingu idngu gudin ugdin gduin dguin udgin dugin guidn ugidn giudn igudn uigdn iugdn gdiun dgiun gidun igdun digun idgun udign duign uidgn iudgn diugn idugn nudig undig nduig dnuig udnig dunig nuidg unidg niudg inudg uindg iundg ndiug dniug nidug indug dinug idnug uding duing uidng iudng diung idung
Note: these 'words' (valid or invalid) are all the permutations of the word gnudi. These words are obtained by scrambling the letters in gnudi.