hyly yhly hlyy lhyy ylhy lyhy hyyl yhyl hyyl yhyl yyhl yyhl hlyy lhyy hyly yhly lyhy ylhy ylyh lyyh yylh yylh lyyh ylyh
Note: these 'words' (valid or invalid) are all the permutations of the word hyly. These words are obtained by scrambling the letters in hyly.