new_contents: ## DO NOT MODIFY THE IMPLEMENTATION OF THE Person CLASS ##
  class Person(object):
      def __init__(self, name):
          #create a person with name name
          self.name = name
          try:
              firstBlank = name.rindex(' ')
              self.lastName = name[firstBlank+1:]
          except:
              self.lastName = name
          self.age = None
      def getLastName(self):
          #return self's last name
          return self.lastName
      def setAge(self, age):
          #assumes age is an int greater than 0
          #sets self's age to age (in years)
          self.age = age
      def getAge(self):
          #assumes that self's age has been set
          #returns self's current age in years
          if self.age == None:
              raise ValueError
          return self.age
      def __lt__(self, other):
          #return True if self's name is lexicographically less
          #than other's name, and False otherwise
          if self.lastName == other.lastName:
              return self.name < other.name
          return self.lastName < other.lastName
      def __str__(self):
          #return self's name
          return self.name
  
  class USResident(Person):
      """
      A Person who resides in the US.
      """
      def __init__(self, name, status):
          """
          Initializes a Person object. A USResident object inherits
          from Person and has one additional attribute:
          status: a string, one of "citizen", "legal_resident", "illegal_resident"
          Raises a ValueError if status is not one of those 3 strings
          """
          Person.__init__(self, name)
  
          if status == "citizen" or status == "legal_resident" or status == "illegal_resident":
              self.status = status
          else:
              raise ValueError
  
      def getStatus(self):
          """
          Returns the status
          """
          return self.status
  
  a = USResident('Tim Beaver', 'citizen')
  print(a.getStatus())
  b = USResident('Tim Horton', 'non-resident')
  
subject: Implement two methods in the USResident class