using System;

​

public class Program

{

    public static void Main()

    {

        double n = double.Parse(Console.ReadLine());

        Result(n);

    }

    static void Result(double n)

    {

        var check = n>=5.50;

        switch(check)

        {

            case true: Console.WriteLine("Excellent!"); break;

            case false: Console.WriteLine("Not excellent."); break;

        }

    }

}