input: def intersection(set1: set, set2: set) -> set:
      """Generate a python program that takes two sets of integers as input and outputs the intersection of those sets.
      >>> intersection({1, 2, 3, 4}, {3, 4, 5, 6})
      {3, 4}
      >>> intersection({1, 2, 3}, {4, 5, 6})
      set()
      """
      return set1 & set2
output:     return set1 & set2