input: Write a python function to create a class that hides and shows a name.
  assert n.showName() == "Alice"
  n.hideName()
  assert n.showName() == "*****"
  n = Name("Alice")
  assert n.showName() == "Alice"
output: class Name:
      def __init__(self, name):
          self._name = name
          self._hidden = False
      
      def showName(self):
          if self._hidden:
              return "*****"
          return self._name
      
      def hideName(self):
          self._hidden = True