input: Write a function that creates a lambda expression in Python to filter a list of integers greater than 50. The function should take a list of integers as input and return a filtered list containing only integers greater than 50. 
  assert filtered_list([45, 12, 52, 89, 33, 99])==[52, 89, 99]
  assert filtered_list([22, 49, 51, 50, 23])==[51]
  assert filtered_list([23, 10, 5, 4, 100])==[100]
  assert filtered_list([50, 50, 50, 50])==[]
  assert filtered_list([])==[]
output: def filtered_list(lst):
      return list(filter(lambda x: x > 50, lst))