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