input: Write a Python function to find the pair of numbers, one from each of the two lists, that has the highest sum.
  assert optimize([1, 2, 3, 4], [5, 6, 7, 8]) == (4, 8)
  assert optimize([-1, -2, -3, -4], [1, 2, 3, 4]) == (-1, 4)
  assert optimize([10, 20, 30], [1, 2, 3]) == (30, 3)
  assert optimize([0, 0, 0], [0, 0, 0]) == (0, 0)
output: def optimize(list1, list2):
      max1 = max(list1)
      max2 = max(list2)
      return max1, max2