using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter side1 length");

        int side1 = int.Parse(Console.ReadLine());

        Console.WriteLine("Enter side2 length");

        int side2 = int.Parse(Console.ReadLine());

        if(side1 == side2)

        {

            int hekef = side1*4;

            Console.WriteLine("hekef=" +hekef);

            int shetash = side1*side2;

            Console.WriteLine("shetash=" +shetash);

            Console.WriteLine("the tetragon is a square");

        }

        else

        {

            Console.WriteLine("the tetragon is not a square");

        }

        if(side1>side2)

        {

            int hefresh = side1-side2;

            Console.WriteLine("hefresh=" +hefresh);

        }

        else

        {

            int hefresh = side2-side1;

            Console.WriteLine("hefresh=" +hefresh);

        }

    }

}