fsogo sfogo fosgo ofsgo sofgo osfgo fsgoo sfgoo fgsoo gfsoo sgfoo gsfoo fogso ofgso fgoso gfoso ogfso gofso sogfo osgfo sgofo gsofo ogsfo gosfo fsoog sfoog fosog ofsog sofog osfog fsoog sfoog fosog ofsog sofog osfog foosg ofosg foosg ofosg oofsg oofsg soofg osofg soofg osofg oosfg oosfg fsgoo sfgoo fgsoo gfsoo sgfoo gsfoo fsogo sfogo fosgo ofsgo sofgo osfgo fgoso gfoso fogso ofgso gofso ogfso sgofo gsofo sogfo osgfo gosfo ogsfo fogos ofgos fgoos gfoos ogfos gofos foogs ofogs foogs ofogs oofgs oofgs fgoos gfoos fogos ofgos gofos ogfos ogofs goofs oogfs oogfs goofs ogofs sogof osgof sgoof gsoof ogsof gosof soogf osogf soogf osogf oosgf oosgf sgoof gsoof sogof osgof gosof ogsof ogosf goosf oogsf oogsf goosf ogosf
Note: these 'words' (valid or invalid) are all the permutations of the word fsogo. These words are obtained by scrambling the letters in fsogo.