Itertools Python3

[Smith]

Hi,
I can not write to the file.
Can someone help me?
Thanks

from itertools import product
valore = input('Inserisci un valore:  ')
risultato = product(valore, repeat = 3)
with open("file.txt", "w") as result:
         for i in risultato:
                 print (result,"".join(i))