import java.util.Scanner;

public class Problem10 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String number = sc.nextLine();
        int i = Integer.parseInt(number);
        String[] oneDigit = {"Zero", "one", "two", "three","four", "five", "six", "seven","eight", "nine","ten" };
        String[] tens = {"eleven", "twelve", "thirteen","fourteen", "fifteen", "sixteen", "seventeen","eighteen", "nineteen"};
        String[] tens2 = {"twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"  };
        String output = "";
        int temp;
        char tempNum1;
        char tempNum2;
        char tempNum3;
        String upperCase;


        if (i >= 0 && i <= 10) {
            output = oneDigit[i];
            upperCase = output.substring(0, 1).toUpperCase() + output.substring(1);
            System.out.println(upperCase);
        } else if (i > 10 && i < 20) {
            output = tens[i - 11];
            upperCase = output.substring(0, 1).toUpperCase() + output.substring(1);
            System.out.println(upperCase);
        } else if (i / 100 > 0) {
            tempNum1 = number.charAt(0);
            int num1 = Integer.parseInt(String.valueOf(tempNum1));
            tempNum2 = number.charAt(1);
            int num2 = Integer.parseInt(String.valueOf(tempNum2));
            tempNum3 = number.charAt(2);
            int num3 = Integer.parseInt(String.valueOf(tempNum3));
            if (num2 > 0 && num3 > 0) {
                output = oneDigit[num1] + " " + "hundred" + " " + tens2[num2 - 2] + " " + oneDigit[num3];
            } else if (num2 == 0 && num3 == 0) {
                output = oneDigit[num1] + " " + "hundred" ;
            } else if (num2 == 0 && num3 > 0) {
                output = oneDigit[num1] + " " + "hundred" + " " + "and" + " "+ oneDigit[num3];
            } else {
                output = oneDigit[num1] + " " + "hundred" + " " + "and" + " " + tens2[num2 - 2];
            }
            upperCase = output.substring(0, 1).toUpperCase() + output.substring(1);
            System.out.println(upperCase);
        } else if (i / 10 > 0) {
            tempNum1 = number.charAt(0);
            int num1 = Integer.parseInt(String.valueOf(tempNum1));
            tempNum2 = number.charAt(1);
            int num2 = Integer.parseInt(String.valueOf(tempNum2));

            if (num2 > 0) {
                output = tens2[num1 - 2] + " " + oneDigit[num2];
            } else {
                output = tens2[num1 - 2];
            }
            upperCase = output.substring(0, 1).toUpperCase() + output.substring(1);
            System.out.println(upperCase);
        }

    }
}