tnyr ntyr tynr ytnr nytr yntr tnry ntry trny rtny nrty rnty tyrn ytrn tryn rtyn yrtn rytn nyrt ynrt nryt rnyt yrnt rynt
Note: these 'words' (valid or invalid) are all the permutations of the word tnyr. These words are obtained by scrambling the letters in tnyr.