input: Write a function to filter a list of integers to include only those greater than 50 using a lambda expression in Python.
  assert filtered_list([45, 12, 52, 89, 33, 99])==[52, 89, 99]
  assert filtered_list([10, 20, 30, 40, 50])==[]
  assert filtered_list([51, 60, 70, 80, 90])==[51, 60, 70, 80, 90]
  assert filtered_list([50, 51, 49, 52])==[51, 52]
  assert filtered_list([])==[]
output: def filtered_list(lst):
      return list(filter(lambda x: x > 50, lst))