class Student{
private String firstName,lastName;
private long matriculation;
static long matr=0;
private int semesterNumber;
Lecture lec;
Tutorial tut;
public Student (String firstName, String lastName, int semesterNumber){
                this.firstName = firstName;
                this.lastName = lastName;
                this.semesterNumber = semesterNumber;
                matriculation=matr;
                matr++;
                }
    public String getFirstName(){
                return firstName;
        }
        public String getLastName(){
                return lastName;
        }
        public int getSemesterNumber(){
                return semesterNumber;
        }
        public long getMatriculation(){
                return matriculation;
        }

        public void setName (String newFirstName){
                firstName = newFirstName;
        }
        public void setLastName (String newLastName){
                lastName = newLastName;
        }
        public void setSemesterNumber (int newSemesterNumber){
                semesterNumber = newSemesterNumber;
        }
@Override
public String toString(){
return ("First Name : "+this.getFirstName()+"\nLast Name : "+this.getLastName()+"\nMatriculations Number : "+this.getMatriculation()+"\nSemester Number : "+this.getSemesterNumber());
}
}


class Lecture{
private String lectureName;
private int lectureNumber;
static int lectn=0;
private Lecturer theLecturer;
    public Lecture(String lectureName){
    this.lectureName=lectureName;
    lectureNumber=lectn;
    lectn++;
    }
    public String getLectureName(){
    return lectureName;
    }
    public int getLectureNumber(){
    return lectureNumber;
    }
    public void setLectureName(String lectureName){
    lectureName=lectureName;
    }
@Override
public String toString(){
return ("Lecture's Name:"+this.getLectureName()+"\nLecture's Number:"+this.getLectureNumber());
}
}


class Tutorial{
private Lecture l;
private String tutorialName;
private int tutorialNumber;
    public Tutorial(String tutorialName,int tutorialNumber,Lecture lect){
    this.tutorialName=lect.getLectureName();
    this.tutorialNumber=tutorialNumber;
    }
public String getTutorialName(){
return tutorialName;
}
public int getTutorialNumber(){
return tutorialNumber;
}
public void setTutorialNumber(int tutNumber){
tutorialNumber=tutNumber;
}

@Override
public String toString(){
return ("Tutorials Name : "+this.getTutorialName()+"\nTutorials Number : "+this.getTutorialNumber());
}
}

class Lecturer{
private String lfirstName,llastName;
private int employeeNumber;
static int emp_number=0;
private Lecture lect;
    public Lecturer(String lfirstName,String llastName){
    this.lfirstName=lfirstName;
    this.llastName=llastName;
    employeeNumber=emp_number;
    emp_number++;
    }
    public String getLfirstName(){
    return lfirstName;
    }
    public String getLlastName(){
    return llastName;
    }
    public int getEmployeeNumber(){
    return employeeNumber;
    }
    public void setLfirstName(String lect_firstName){
    lfirstName=lect_firstName;
    }
    public void setLlastName(String lect_lastName){
    llastName=lect_lastName;
    }


@Override
public String toString(){
return ("First Name of the Lecturer :"+this.getLfirstName()+"\nLast Name of the Lecturer :"+this.getLlastName()+"\nEmployee's Number:"+this.getEmployeeNumber());
}
}

public class Teilc{

    public static void main(String[] args){
        Student st1=new Student("Mouadh","Khlifi",1);
        Lecture lec1=new Lecture("Programmieren");
        Lecturer lecturer1=new Lecturer("Ralf","Reussner");
        Tutorial tut1=new Tutorial(lec1.getLectureName(),20,lec1);
    System.out.println(st1+"\n\n"+lec1+"\n\n"+lecturer1+"\n\n"+tut1+"\n\n");

}
}