class Fag:

    def __init__(self, fag):
        self._fag = fag
        self._studListe = []

    def leggTilStudent(self, student):
        self._studListe.append(student)

    def hentAntallStudenter(self):
        return len(self._studListe)

    def hentFagNavn(self):
        return self._fag

    def skrivStudenterVedFag(self):
        print(self._fag)
        for student in self._studListe:
            print(student.hentStudentNavn())