abstract class Student extends Person{
    private int studentID;

    public Student(String navn, int alder, int stdID) {
        super(navn, alder);
        studentID = stdID;
    }

    public int hentStudentID() {
        return studentID;
    }
}

class Bachelor extends Student {
    public Bachelor(String navn, int alder, int stdID) {
        super(navn, alder, stdID);
    }

    @Override
    public String toString() {
        return "Bachelor " + navn;
    }
}


class Master extends Student {
    public Master(String navn, int alder, int stdID) {
        super(navn, alder, stdID);
    }
}