input: `find_pair` is the function we are going to test.
  
  
  def find_pair(lst, target):
      """Given a list of integers and a target integer, returns a list of two numbers from the list that add up to the target.
      If no such pair exists, returns None.
      
      >>> find_pair([1, 2, 3, 4, 4, 5, 6], 8)
      [2, 6]
      >>> find_pair([1, 1, 1, 1], 3)
      None
      """
      for i in range(len(lst)):
          if (target - lst[i]) in lst[i+1:]:
              return [lst[i], target-lst[i]]
      return None
  
  
  You then write a question below based on this code that it was testing: 
  
  What is the output of the function `find_pair()` if the input list is `[1, 2, 3, 4, 5, 6]` and the target number is `9`?
output:     for i in range(len(lst)):
          if (target - lst[i]) in lst[i+1:]:
              return [lst[i], target-lst[i]]
      return None