oxed xoed oexd eoxd xeod exod oxde xode odxe doxe xdoe dxoe oedx eodx odex doex edox deox xedo exdo xdeo dxeo edxo dexo
Note: these 'words' (valid or invalid) are all the permutations of the word oxed. These words are obtained by scrambling the letters in oxed.