input: Write a python function to shuffle a standard deck of 52 cards.
  assert sorted(shuffle_deck()) == sorted([2, 3, 4, 5, 6, 7, 8, 9, 10, 'J', 'Q', 'K', 'A'] * 4)
  assert len(shuffle_deck()) == 52
  assert set(shuffle_deck()).intersection(set([2, 3, 4, 5, 6, 7, 8, 9, 10, 'J', 'Q', 'K', 'A'])) == set([2, 3, 4, 5, 6, 7, 8, 9, 10, 'J', 'Q', 'K', 'A'])
output: import random
  
  def shuffle_deck():
      deck = [2, 3, 4, 5, 6, 7, 8, 9, 10, 'J', 'Q', 'K', 'A'] * 4
      random.shuffle(deck)
      return deck