howf ohwf hwof whof owhf wohf hofw ohfw hfow fhow ofhw fohw hwfo whfo hfwo fhwo wfho fwho owfh wofh ofwh fowh wfoh fwoh
Note: these 'words' (valid or invalid) are all the permutations of the word howf. These words are obtained by scrambling the letters in howf.