wsiss swiss wisss iwsss siwss iswss wssis swsis wssis swsis sswis sswis wisss iwsss wsiss swiss iswss siwss sisws issws ssiws ssiws issws sisws wsiss swiss wisss iwsss siwss iswss wssis swsis wssis swsis sswis sswis wisss iwsss wsiss swiss iswss siwss sisws issws ssiws ssiws issws sisws wsssi swssi wsssi swssi sswsi sswsi wsssi swssi wsssi swssi sswsi sswsi wsssi swssi wsssi swssi sswsi sswsi ssswi ssswi ssswi ssswi ssswi ssswi wisss iwsss wsiss swiss iswss siwss wisss iwsss wsiss swiss iswss siwss wssis swsis wssis swsis sswis sswis issws sisws issws sisws ssiws ssiws sissw isssw ssisw ssisw isssw sissw sissw isssw ssisw ssisw isssw sissw sssiw sssiw sssiw sssiw sssiw sssiw isssw sissw isssw sissw ssisw ssisw
Note: these 'words' (valid or invalid) are all the permutations of the word wsiss. These words are obtained by scrambling the letters in wsiss.