# -*- coding: utf-8 -*-

class Student(object):

    def __init__(self, name, score):

        self.name = name

        self.score = score

    def print_score(self):

        print('%s: %s' % (self.name, self.score))

    def get_grade(self):

        s = self.score

        if s >= 90:

            return 'A'

        elif s >= 75:

            return 'B'

        elif s >= 60:

            return 'C'

        else:

            return 'D'

student = Student('Alan', 78)

student.print_score()

print(student.get_grade())