using System;

public class Program

{

    public static void Main()

    {

        Person person = new Person("John Smith", 43);

        Student student = new Student("Pranav Jasti", 17, 112711);

        Teacher teacher = new Teacher("Ella Kemp", 35, "Math");

        Person[] people = {person, student, teacher};

        for (int i = 0; i < people.Length; i++)

        {

            Console.WriteLine(people[i].DisplayDetails());

            Console.WriteLine();

        }

    }

}

class Person

{

    public string Name{get; set;}

    public int Age{get; set;}

    public Person(string name, int age)

    {

        Name = name;

        Age = age;

    }

    public virtual string DisplayDetails()

    {

        return "Name: " + Name + "\nAge: " + Age;

    }

}

class Student : Person

{

    public int StudentId {get; set;}

    public Student(string name, int age, int studentId) : base(name, age)

    {

        StudentId = studentId;

    }

    public override string DisplayDetails()

    {

        return base.DisplayDetails() + "\nStudentId: " + StudentId;

    }

}

class Teacher : Person

{

    public string Subject{get; set;}

    public Teacher(string name, int age, string subject) : base(name, age)

    {

        Subject = subject;

    }

    public override string DisplayDetails()

    {

        return base.DisplayDetails() + "\nSubject: " + Subject;

    }

}