oppos popos oppos popos ppoos ppoos opops poops oopps oopps poops opops opops poops oopps oopps poops opops ppoos ppoos popos oppos popos oppos oppso popso oppso popso pposo pposo opspo pospo osppo soppo psopo spopo opspo pospo osppo soppo psopo spopo ppsoo ppsoo pspoo sppoo pspoo sppoo oposp poosp oopsp oopsp poosp oposp opsop posop ospop sopop psoop spoop oospp oospp osopp soopp osopp soopp posop opsop psoop spoop ospop sopop oposp poosp oopsp oopsp poosp oposp opsop posop ospop sopop psoop spoop oospp oospp osopp soopp osopp soopp posop opsop psoop spoop ospop sopop pposo pposo popso oppso popso oppso ppsoo ppsoo pspoo sppoo pspoo sppoo pospo opspo psopo spopo osppo soppo pospo opspo psopo spopo osppo soppo
Note: these 'words' (valid or invalid) are all the permutations of the word oppos. These words are obtained by scrambling the letters in oppos.