input: Write a function to split a list of strings into two lists based on the evenness of their lengths.
  assert split_list(["apple", "banana", "cherry", "date", "fig", "grape"]) == (["banana", "date", "grape"], ["apple", "cherry", "fig"])
  assert split_list(["a", "bb", "ccc", "dddd", "eeeee", "ffffff"]) == (["bb", "dddd", "ffffff"], ["a", "ccc", "eeeee"])
  assert split_list(["one", "three", "four", "five"]) == (["four"], ["one", "three", "five"])
output: def split_list(strings):
      even_length = [s for s in strings if len(s) % 2 == 0]
      odd_length = [s for s in strings if len(s) % 2 != 0]
      return (even_length, odd_length)