input: Write a function to sort a list of tuples in descending order based on the second element of each tuple.
  assert sortTupleListInDescendingOrder([('a', 3), ('b', 1), ('c', 4)]) == [('c', 4), ('a', 3), ('b', 1)]
  assert sortTupleListInDescendingOrder([('a', 3), ('b', 5), ('c', 2)]) == [('b', 5), ('a', 3), ('c', 2)]
  assert sortTupleListInDescendingOrder([('x', 10), ('y', 30), ('z', 20)]) == [('y', 30), ('z', 20), ('x', 10)]
output: def sortTupleListInDescendingOrder(lst):
      return sorted(lst, key=lambda x: x[1], reverse=True)