ardri radri adrri darri rdari drari arrdi rardi arrdi rardi rradi rradi adrri darri ardri radri drari rdari rdrai drrai rrdai rrdai drrai rdrai ardir radir adrir darir rdair drair aridr raidr airdr iardr riadr iradr adirr dairr aidrr iadrr diarr idarr rdiar driar ridar irdar dirar idrar arrid rarid arrid rarid rraid rraid arird raird airrd iarrd riard irard arird raird airrd iarrd riard irard rriad rriad rirad irrad rirad irrad adrir darir ardir radir drair rdair adirr dairr aidrr iadrr diarr idarr aridr raidr airdr iardr riadr iradr driar rdiar dirar idrar ridar irdar rdria drria rrdia rrdia drria rdria rdira drira ridra irdra dirra idrra rrida rrida rirda irrda rirda irrda drira rdira dirra idrra ridra irdra
Note: these 'words' (valid or invalid) are all the permutations of the word ardri. These words are obtained by scrambling the letters in ardri.