using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Triangle
{
    class Program
    {
        static void Main(string[] args)
        {
            var a = decimal.Parse(Console.ReadLine());
            var b = decimal.Parse(Console.ReadLine());
            var c = decimal.Parse(Console.ReadLine());

            if (a < b + c && b < a + c && c < a + b)
            {
                if (a == b && b == c)
                {
                    Console.WriteLine("Triangle with sides {0}, {1} and {2} is equilateral.",
                        a.ToString("0.###"), b.ToString("0.###"), c.ToString("0.###"));
                }
                else if (a == b)
                {
                    Console.WriteLine("Triangle with sides {0}, {1} and {2} is isosceles.",
                        a.ToString("0.###"), b.ToString("0.###"), c.ToString("0.###"));
                }
                else
                {
                    Console.WriteLine("Triangle with sides {0}, {1} and {2} is scalene.",
                        a.ToString("0.###"), b.ToString("0.###"), c.ToString("0.###"));
                }
            }
            else
            {
                Console.WriteLine("There is no triangle with sides {0}, {1} and {2}.",
                    a.ToString("0.###"), b.ToString("0.###"), c.ToString("0.###"));
            }
        }


    }
}