input: Write a python function to separate even and odd numbers from a list.
  assert separate_even_odd([1, 2, 3, 4, 5, 6]) == ([2, 4, 6], [1, 3, 5])
  assert separate_even_odd([10, 21, 32, 43, 54, 65]) == ([10, 32, 54], [21, 43, 65])
  assert separate_even_odd([7, 8, 13, 16, 19, 20]) == ([8, 16, 20], [7, 13, 19])
output: def separate_even_odd(numbers):
      evens = [num for num in numbers if num % 2 == 0]
      odds = [num for num in numbers if num % 2 != 0]
      return (evens, odds)