input: Write a python function to shuffle the elements of a list.
  assert len(shuffle_list([1, 2, 3, 4, 5])) == 5
  assert set(shuffle_list([1, 2, 3])) == {1, 2, 3}
  assert sorted(shuffle_list([10, 20, 30, 40, 50])) == [10, 20, 30, 40, 50]
output: import random
  
  def shuffle_list(lst):
      random.shuffle(lst)
      return lst