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

namespace _03.Triangle
{
    class Program
    {
        static void Main(string[] args)
        {
            double a = double.Parse(Console.ReadLine());
            double b = double.Parse(Console.ReadLine());
            double c = double.Parse(Console.ReadLine());

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