using System;


namespace ResultCheckOcenkaArray
{
    class Program
    {
        static void Main(string[] args)
        {
            double ocenka = 0.00D;
            var array = new[] { "poor", "average", "good", "very good", "excellent" };
            Nachalo:
            string input = Console.ReadLine();
            if (input.Length == 4 || input.Length == 1 )
            {
                if (double.TryParse(input, out ocenka))
                {
                    if (ocenka >= 2.00 && ocenka <=6)
                    {
                        Console.WriteLine(array[(int)Math.Round(ocenka) - 2]);
                        goto Nachalo;
                    }
                        goto Nachalo;
                }
                    goto Nachalo;
            }
                goto Nachalo;
        }
    }
}