input: Write a python function to shuffle a given sequence.
  assert set(shuffle_sequence([1, 2, 3])) == {1, 2, 3}
  assert set(shuffle_sequence(['a', 'b', 'c'])) == {'a', 'b', 'c'}
  assert set(shuffle_sequence([10, 20, 30])) == {10, 20, 30}
output: import random
  
  def shuffle_sequence(seq):
      shuffled = seq[:]
      random.shuffle(shuffled)
      return shuffled