fuffy ufffy ffufy ffufy ufffy fuffy fuffy ufffy ffufy ffufy ufffy fuffy fffuy fffuy fffuy fffuy fffuy fffuy ufffy fuffy ufffy fuffy ffufy ffufy fufyf uffyf ffuyf ffuyf uffyf fufyf fuyff ufyff fyuff yfuff uyfff yufff ffyuf ffyuf fyfuf yffuf fyfuf yffuf ufyff fuyff uyfff yufff fyuff yfuff fufyf uffyf ffuyf ffuyf uffyf fufyf fuyff ufyff fyuff yfuff uyfff yufff ffyuf ffyuf fyfuf yffuf fyfuf yffuf ufyff fuyff uyfff yufff fyuff yfuff fffyu fffyu fffyu fffyu fffyu fffyu ffyfu ffyfu fyffu yfffu fyffu yfffu ffyfu ffyfu fyffu yfffu fyffu yfffu ffyfu ffyfu fyffu yfffu fyffu yfffu uffyf fufyf uffyf fufyf ffuyf ffuyf ufyff fuyff uyfff yufff fyuff yfuff ufyff fuyff uyfff yufff fyuff yfuff ffyuf ffyuf fyfuf yffuf fyfuf yffuf
Note: these 'words' (valid or invalid) are all the permutations of the word fuffy. These words are obtained by scrambling the letters in fuffy.