using System;

public class Program

{

    static int angle1;

    static int angle2;

    static int angle3;

    static bool error = true;

    public static void Main()

    {

        while(error)

        {

          Console.WriteLine("Please enter 3 angles ");

            angle1=Convert.ToInt32(Console.ReadLine());

            angle2=Convert.ToInt32(Console.ReadLine()); 

            angle3=Convert.ToInt32(Console.ReadLine()); 

        if (angle1==60&angle2==60&angle3==60)

        {

          Console.WriteLine("Equilateral");

            Console.ReadLine();

                Console.Clear();

        }

            else if (angle1 + angle2+angle3==180 && angle1==angle2||angle1 + angle2+angle3==180 &&angle1==angle3||angle1 + angle2+angle3==180 &&angle3==angle2)

            {

            Console.WriteLine("Isosceles");

                Console.ReadLine();

                Console.Clear();

            }

            else if (angle1 + angle2+angle3==180)

            {

            Console.WriteLine("Scalene");

                Console.ReadLine();

                Console.Clear();

            }

            else 

            {

            Console.WriteLine("Error");

                Console.ReadLine();

                Console.Clear();

                error=false;

            }

        }

    }

}