using System;


public class Person{
private string name1;
private string name2;
private System.DateTime birth;

public Person()
{
name1="polya";
name2="ivanova";
birth=new DateTime(1999,11,22);
}

public Person(string n1,string n2,DateTime b)
{
this.name1=n1;
this.name2=n2;
this.birth=b;
}
 /////////////////
public string Name
{
get
{
return name1;
}
set {
name1=value;
}

}
public string SecondName
{
get
{
return name2;
}
set {
name2=value;
}

}
	////////////
public DateTime Birth
{
get
{
return birth;
}
set {
birth=value;
}

}
public int Year
{
get
{
return birth.Year;
}
set {

birth=new DateTime(value,birth.Month,birth.Day);
}
}


	/////////////
    public override string ToString()
{

    return Name+SecondName+Birth.ToString();
}



public virtual  string ToShortString()
{

    return Name+SecondName;
}
}



////////////////////////////
enum Education {Specialist, Вachelor, SecondEducation}

class Exam
{
	string subject;
	int rate;
	DateTime examday;
	///////////////
	public string Subject
{
get
{
return subject;
}
set {
subject=value;
}

}
public int Rate
{
get
{
return rate;
}
set {
rate=value;
}

}
	////////////
public DateTime Examday
{
get
{
return examday;
}
set {
examday=value;
}
}

	public Exam()
{
subject="pract";
rate=5;
examday=new DateTime(2017,05,30);
}

public Exam(string sub,int r,DateTime ed)
{
this.subject=sub;
this.rate=r;
this.examday=ed;
}
public override string  ToString()
{
	return Subject+Rate.ToString()+Examday.ToString();
}

}
///////////////
//////////////
public class Student
{
	private Person pers;
	private Education fo;
	private int gruppa;
	private Exam[] exams;


	/////




	public Student()
{
pers.Birth=new DateTime(1999,11,22);

fo=Education.Вachelor;
gruppa=862;
}

public Student(Person per,Education edu,int g)
{
this.pers=per;
this.fo=edu;
this.gruppa=g;
}

}

public class Program

{
public static void Main()
{
DateTime d=new DateTime(1999,11,22);
Person f= new Person("polya","ivanova",d);
f.Year=2000;
Console.WriteLine(f.Year);
    Console.WriteLine(f.ToString());
    Console.WriteLine(f.ToShortString());

}
}