input: Write a function to create a shuffled version of a given list.
  assert shuffle_list([1, 2, 3, 4, 5]) != [1, 2, 3, 4, 5]
  assert shuffle_list(['a', 'b', 'c']) != ['a', 'b', 'c']
  assert len(shuffle_list([1, 2, 3, 4, 5])) == 5
  assert len(shuffle_list(['a', 'b', 'c'])) == 3
output: import random
  
  def shuffle_list(lst):
      shuffled = lst[:]
      random.shuffle(shuffled)
      return shuffled