spook psook sopok ospok posok opsok spook psook sopok ospok posok opsok soopk osopk soopk osopk oospk oospk poosk oposk poosk oposk oopsk oopsk spoko psoko sopko ospko posko opsko spkoo pskoo skpoo kspoo pksoo kpsoo sokpo oskpo skopo ksopo okspo kospo pokso opkso pkoso kposo okpso kopso spoko psoko sopko ospko posko opsko spkoo pskoo skpoo kspoo pksoo kpsoo sokpo oskpo skopo ksopo okspo kospo pokso opkso pkoso kposo okpso kopso sookp osokp sookp osokp ooskp ooskp sokop oskop skoop ksoop oksop kosop sokop oskop skoop ksoop oksop kosop ooksp ooksp okosp koosp okosp koosp pooks opoks pooks opoks oopks oopks pokos opkos pkoos kpoos okpos kopos pokos opkos pkoos kpoos okpos kopos ookps ookps okops koops okops koops
Note: these 'words' (valid or invalid) are all the permutations of the word spook. These words are obtained by scrambling the letters in spook.