class Employee:
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary
        # self.age = None

    def printclass(self):
        try:
            print(f'{self.name}\'salary is {self.salary}, and his age is {self.age}')
        except AttributeError:
            print('Error! No age')
        

name = input()
salary = int(input())
age = int(input())
e = Employee(name, salary)
e.printclass()
e.age = age
e.printclass()