class Osoba:
    def __init__(self, name, last_name, age):
        self.name = name
        self.last_name = last_name
        self.age = age

    def get_name(self):
        return self.name

    def get_last_name(self):
        return self.last_name

    def get_age(self):
        return self.age

# Przykładowe utworzenie obiektu klasy Osoba
osoba = Osoba("Jan", "Kowalski", 30)
print(osoba.get_name())       # Output: Jan
print(osoba.get_last_name())  # Output: Kowalski
print(osoba.get_age())        # Output: 30

class Student(Osoba):
    def __init__(self, name, last_name, age, index_nr):
        super().__init__(name, last_name, age)
        self.index_nr = index_nr

    def get_index_nr(self):
        return self.index_nr

# Przykładowe utworzenie obiektu klasy Student
student = Student("Anna", "Nowak", 22, "123456")
print(student.get_name())       # Output: Anna
print(student.get_last_name())  # Output: Nowak
print(student.get_age())        # Output: 22
print(student.get_index_nr())   # Output: 123456