input: Write a python function to shuffle the elements of a list using the random.shuffle method.
  assert sorted(shuffle([1, 5, 9, 4, 2])) == [1, 2, 4, 5, 9]
  assert sorted(shuffle([10, 20, 30, 40, 50])) == [10, 20, 30, 40, 50]
  assert sorted(shuffle([7, 3, 5, 8, 6])) == [3, 5, 6, 7, 8]
output: import random
  
  def shuffle(lst):
      random.shuffle(lst)
      return lst