input: Write a function to optimize the given Python program by reducing the number of print statements used in the loop to print each element in the list. The optimized program should achieve the same output. 
  assert optimize_loop([1, 2, 3, 4, 5, 6])==[1, 2, 3, 4, 5, 6]
  assert optimize_loop([4, 5, 6, 7])==[4, 5, 6, 7]
  assert optimize_loop([])==[]
  return the list numbers without modification but the print statement should be optimized.
output: def optimize_loop(numbers):
      print(*numbers, sep='\n')
      return numbers