input: Write a function to filter strings with even length from a list.
  assert filter_even_length_strings(["apples", "oranges", "bananas", "pineapples"]) == ["apples", "oranges", "pineapples"]
  assert filter_even_length_strings(["hello", "world", "python", "code"]) == ["hello", "world"]
  assert filter_even_length_strings(["a", "bb", "ccc", "dddd", "eeeee"]) == ["bb", "dddd"]
output: def filter_even_length_strings(strings):
      return [s for s in strings if len(s) % 2 == 0]