using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("input the size of the firsr esge in the triangle");

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

        Console.WriteLine("input the size of the second esge in the triangle");

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

        Console.WriteLine("input the size of the third esge in the triangle");

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

        if(a == b && b == c)

            Console.WriteLine("Equilateral triangle");

        else

        Console.WriteLine("Regular triangle");  

    }

}