radar ardar rdaar draar adrar darar raadr aradr raadr aradr aardr aardr rdaar draar radar ardar darar adrar adarr daarr aadrr aadrr daarr adarr radra ardra rdara drara adrra darra rarda arrda rrada rrada arrda rarda rdraa drraa rrdaa rrdaa drraa rdraa adrra darra ardra radra drara rdara raard arard raard arard aarrd aarrd rarad arrad rraad rraad arrad rarad rarad arrad rraad rraad arrad rarad aarrd aarrd arard raard arard raard rdara drara radra ardra darra adrra rdraa drraa rrdaa rrdaa drraa rdraa rarda arrda rrada rrada arrda rarda darra adrra drara rdara ardra radra adarr daarr aadrr aadrr daarr adarr adrar darar ardar radar draar rdaar aardr aardr aradr raadr aradr raadr darar adrar draar rdaar ardar radar
Note: these 'words' (valid or invalid) are all the permutations of the word radar. These words are obtained by scrambling the letters in radar.