input: Write a python function to sort a list of tuples based on the second element in descending order.
  assert sortTuples([(1, 3), (3, 2), (2, 5)]) == [(2, 5), (1, 3), (3, 2)]
  assert sortTuples([(4, 1), (5, 6), (7, 3)]) == [(5, 6), (7, 3), (4, 1)]
  assert sortTuples([(1, 1), (1, 1), (1, 1)]) == [(1, 1), (1, 1), (1, 1)]
output: def sortTuples(lst):
      return sorted(lst, key=lambda x: x[1], reverse=True)