input: Write a function that uses a lambda expression to filter a list of integers greater than 50.
  
  def filter_greater_than_50(lst):
      return list(filter(lambda x: x > 50, lst))
  
  assert filter_greater_than_50([45, 12, 52, 89, 33, 99])==[52, 89, 99]
  assert filter_greater_than_50([10, 20, 30, 40, 50, 60])==[60]
  assert filter_greater_than_50([])==[]
  assert filter_greater_than_50([55, 65, 75])==[55, 65, 75]
  assert filter_greater_than_50([50, 40, 30, 20])==[]
output: def filter_greater_than_50(lst):
      return list(filter(lambda x: x > 50, lst))