class Stud:
    def __init__(self, alder):
        self.alder = alder

    def hentAlder(self):
        return self.alder

students = {"Arne":Stud(10), "Bjarne":Stud(200), "Brynjulf":Stud(15), "Lisa":Stud(56), "Mona":Stud(20)}

for navn in students:
    print(navn + ":" , students[navn].hentAlder())