using System;


namespace DigitAsAWord
{
    class DigitAsAWord
    {
        static void Main()
        {
            string input = Console.ReadLine();
            int number;
            string result = "";
            if (int.TryParse(input,out number))
            {
                switch (number)
                {
                    case 0:
                        result = "zero";
                        break;
                    case 1:
                        result = "one";
                        break;
                    case 2:
                        result = "two";
                        break;
                    case 3:
                        result = "three";
                        break;
                    case 4:
                        result = "four";
                        break;
                    case 5:
                        result = "five";
                        break;
                    case 6:
                        result = "six";
                        break;
                    case 7:
                        result = "seven";
                        break;
                    case 8:
                        result = "eight";
                        break;
                    case 9:
                        result = "nine";
                        break;
                    default:
                        result = "not a digit";
                        break;

                }
            }
            else
            {
                result = "not a digit";
            }

            Console.WriteLine(result);
        }
    }
}