input: 
  def find_pair(lst: List[int], target: int) -> List[int]:
      """ Given a list of numbers and a target number, find a pair of numbers from the given list that add up to the given target.
      >>> find_pair([1, 2, 3, 4, 4, 5, 6], 8)
      [2, 6]
      >>> find_pair([1, 3, 5, 7, 9], 12)
      [3, 9]
      >>> find_pair([2, 4, 6, 8, 10], 14)
      [4, 10]
      """
      for i in range(len(lst)):
          if (target - lst[i]) in lst[i+1:]:
              return [lst[i], target - lst[i]]
output:     return []