ipuss piuss iupss uipss puiss upiss ipsus pisus ispus sipus psius spius iusps uisps isups siups usips suips pusis upsis psuis spuis uspis supis ipuss piuss iupss uipss puiss upiss ipsus pisus ispus sipus psius spius iusps uisps isups siups usips suips pusis upsis psuis spuis uspis supis ipssu pissu ispsu sipsu psisu spisu ipssu pissu ispsu sipsu psisu spisu isspu sispu isspu sispu ssipu ssipu pssiu spsiu pssiu spsiu sspiu sspiu iussp uissp isusp siusp usisp suisp iussp uissp isusp siusp usisp suisp issup sisup issup sisup ssiup ssiup ussip susip ussip susip ssuip ssuip pussi upssi psusi spusi uspsi supsi pussi upssi psusi spusi uspsi supsi pssui spsui pssui spsui sspui sspui usspi suspi usspi suspi ssupi ssupi
Note: these 'words' (valid or invalid) are all the permutations of the word ipuss. These words are obtained by scrambling the letters in ipuss.