igfy gify ifgy figy gfiy fgiy igyf giyf iygf yigf gyif ygif ifyg fiyg iyfg yifg fyig yfig gfyi fgyi gyfi ygfi fygi yfgi
Note: these 'words' (valid or invalid) are all the permutations of the word igfy. These words are obtained by scrambling the letters in igfy.