whiss hwiss wihss iwhss hiwss ihwss whsis hwsis wshis swhis hswis shwis wishs iwshs wsihs swihs iswhs siwhs hisws ihsws hsiws shiws ishws sihws whiss hwiss wihss iwhss hiwss ihwss whsis hwsis wshis swhis hswis shwis wishs iwshs wsihs swihs iswhs siwhs hisws ihsws hsiws shiws ishws sihws whssi hwssi wshsi swhsi hswsi shwsi whssi hwssi wshsi swhsi hswsi shwsi wsshi swshi wsshi swshi sswhi sswhi hsswi shswi hsswi shswi sshwi sshwi wissh iwssh wsish swish iswsh siwsh wissh iwssh wsish swish iswsh siwsh wssih swsih wssih swsih sswih sswih isswh siswh isswh siswh ssiwh ssiwh hissw ihssw hsisw shisw ishsw sihsw hissw ihssw hsisw shisw ishsw sihsw hssiw shsiw hssiw shsiw sshiw sshiw isshw sishw isshw sishw ssihw ssihw
Note: these 'words' (valid or invalid) are all the permutations of the word whiss. These words are obtained by scrambling the letters in whiss.