using System;

public class Program

{

    public static void Main()

    {

    //Hassan Fayad

        int A;

        int B;

        int C;

        Console.WriteLine("Welcome");

        Console.WriteLine("Tell me the length of one side of the triangle");

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

        Console.WriteLine("Tell me another length of the triangle");

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

        Console.WriteLine("Tell me the last length of the triangle");

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

        if (A==B && A==C && B==C)

        {

            Console.WriteLine("The triangle is scalene" );

        }

        else if (A==B || A==C || B==C)

        {

            Console.WriteLine("The triangle is isosceles " );

        }

        else if (A!=B || A!=C || B!=C)

        {

            Console.WriteLine("The triangle is equilateral" );

        }

    }

}