fogou ofgou fgoou gfoou ogfou gofou foogu ofogu foogu ofogu oofgu oofgu fgoou gfoou fogou ofgou gofou ogfou ogofu goofu oogfu oogfu goofu ogofu foguo ofguo fgouo gfouo ogfuo gofuo fougo ofugo fuogo ufogo oufgo uofgo fguoo gfuoo fugoo ufgoo gufoo ugfoo ogufo goufo ougfo uogfo guofo ugofo fooug ofoug fooug ofoug oofug oofug fouog ofuog fuoog ufoog oufog uofog fouog ofuog fuoog ufoog oufog uofog ooufg ooufg ouofg uoofg ouofg uoofg fgouo gfouo foguo ofguo gofuo ogfuo fguoo gfuoo fugoo ufgoo gufoo ugfoo fougo ofugo fuogo ufogo oufgo uofgo goufo ogufo guofo ugofo ougfo uogfo ogouf goouf ooguf ooguf goouf ogouf oguof gouof ougof uogof guoof ugoof oougf oougf ouogf uoogf ouogf uoogf gouof oguof guoof ugoof ougof uogof
Note: these 'words' (valid or invalid) are all the permutations of the word fogou. These words are obtained by scrambling the letters in fogou.