input: 
  from typing import List
  
  def union_of_lists(list1: List[int], list2: List[int]) -> List[int]:
      """Find the union of two lists and return the result as a list.
      >>> union_of_lists([1, 2, 3, 4, 5], [3, 4, 5, 6, 7])
      [1, 2, 3, 4, 5, 6, 7]
      """
  
  
output:     result = list(set(list1) | set(list2))
      return sorted(result)