input: Write a python function to shuffle a list.
  assert sorted(shuffle([1, 2, 3, 4, 5])) == [1, 2, 3, 4, 5]
  assert sorted(shuffle([10, 20, 30, 40, 50])) == [10, 20, 30, 40, 50]
  assert sorted(shuffle([5, 10, 15, 20, 25])) == [5, 10, 15, 20, 25]
output: import random
  
  def shuffle(lst):
      random.shuffle(lst)
      return lst