using System;

class DigitasWord
{
    static void Main()
    {

        string d = Console.ReadLine();
        int dNumber = 0;
        bool check = Int32.TryParse(d, out dNumber);
        if (check == true)
        {
            dNumber = int.Parse(d);

            if (dNumber >= 0 && dNumber <= 9)
            {
                switch (dNumber)
                {
                    case 0:
                        Console.WriteLine("zero");
                        break;
                    case 1:
                        Console.WriteLine("one");
                        break;
                    case 2:
                        Console.WriteLine("two");
                        break;
                    case 3:
                        Console.WriteLine("three");
                        break;
                    case 4:
                        Console.WriteLine("four");
                        break;
                    case 5:
                        Console.WriteLine("five");
                        break;
                    case 6:
                        Console.WriteLine("six");
                        break;
                    case 7:
                        Console.WriteLine("seven");
                        break;
                    case 8:
                        Console.WriteLine("eight");
                        break;
                    case 9:
                        Console.WriteLine("nine");
                        break;
                    default:
                        Console.WriteLine("not a digit");
                        break;
                }
            }
            else
            {
                Console.WriteLine("Error!");
            }
        }
        else
        {
            Console.WriteLine("Error!");
        }
    }

}