class Person():

    def __init__(self,fName,lName):
        self.firstName=fName
        self.lastName=lName

    def getFirst(self):
        return self.firstName

    def getLast(self):
        return self.lastName

    def getName(self):
        return self.lastName+", "+self.firstName

    def saySomething(self):
        return "Hi. My Name is {}.".format(self.firstName)

    def __str__(self):
        return self.firstName+" "+self.lastName

class HGSperson(Person):

    ID=0

    def __init__(self,fName,lName):
       Person.__init__(self,fName,lName)
       HGSperson.ID=HGSperson.ID+1
       self.ID=HGSperson.ID

    def getID(self):
        return self.ID

    def getName(self):
        return self.firstName+" "+self.lastName

    def __str__(self):
        return "HGS Person: {},{}".format(self.lastName,self.firstName)

class Student(HGSperson):

    years=["","freshman","sophomore","junior","senior"]
    
    def __init__(self, firstName,lastName,year=1):
        HGSperson.__init__(self,firstName,lastName)
        self.year=year

    def getYear(self):
        return Student.years[self.year]

    def advanceYear(self):
        if self.year<=3:
            self.year=self.year+1

    def introduction(self):
        return "Hi. My name is {}. I am a student at HGS.".format(self.firstName)

    def saySomething(self,something,toWhom):
        return "Hey {}. {}.".format(toWhom.firstName,something)
        
class Faculty(HGSperson):

    def __init__(self):
        pass