oxph xoph opxh poxh xpoh pxoh oxhp xohp ohxp hoxp xhop hxop ophx pohx ohpx hopx phox hpox xpho pxho xhpo hxpo phxo hpxo
Note: these 'words' (valid or invalid) are all the permutations of the word oxph. These words are obtained by scrambling the letters in oxph.