input: from typing import List
  
  def filter_even_numbers(numbers: List[int]) -> List[int]:
      """ Filter out all the even numbers from a given list.
      >>> filter_even_numbers([3, 4, 5, 6, 7])
      [4, 6]
      >>> filter_even_numbers([1, 2, 3, 4, 5, 6, 7, 8, 9])
      [2, 4, 6, 8]
      >>> filter_even_numbers([11, 13, 15, 17])
      []
      """
      even_numbers = []
      for i in numbers:
          if i % 2 == 0:
              even_numbers.append(i)
      return even_numbers
output:     even_numbers = []
      for i in numbers:
          if i % 2 == 0:
              even_numbers.append(i)
      return even_numbers