#!/usr/bin/python3

import datetime

class Person(object):
    def __init__(self, name):
        """Create a person called name"""
        self.name = name
        self.birthday = None
        self.lastName = name.split(' ')[-1]

    def getLastName(self):
        """return self's last name"""
        return self.lastName

    def __str__(self):
        """return self's name"""
        return self.name


    def setBirthday(self,month,day,year):
        """sets self's birthday to birthDate"""
        self.birthday = datetime.date(year,month,day)

    def getAge(self):
        """returns self's current age in days"""
        if self.birthday == None:
            raise ValueError
        return (datetime.date.today() - self.birthday.days())

    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