input: Write a function that creates a lambda expression in Python to filter a list of integers greater than 50. If the list is empty then return an empty list.
  assert filtered_list([45, 12, 52, 89, 33, 99])==[52, 89, 99]
  assert filtered_list([10, 20, 30, 40])==[]
  assert filtered_list([60, 70, 80, 90])==[60, 70, 80, 90]
  assert filtered_list([])==[]
output: def filtered_list(lst):
      return list(filter(lambda x: x > 50, lst))