#include <bits/stdc++.h>
int main() {
  int number;
  int first_digit;
  int second_digit;
  std::cin >> number;
  if (number == 0) std::cout << "zero";
  first_digit = number / 10;
  second_digit = number % 10;
  if (number >= 11 && number <= 20) {
    switch (number) {
      case 11:
        std::cout << "eleven";
        break;
      case 12:
        std::cout << "twelve";
        break;
      case 13:
        std::cout << "thirteen";
        break;
      case 14:
        std::cout << "fourteen";
        break;
      case 15:
        std::cout << "fifteen";
        break;
      case 16:
        std::cout << "sixteen";
        break;
      case 17:
        std::cout << "seventeen";
        break;
      case 18:
        std::cout << "eighteen";
        break;
      case 19:
        std::cout << "nineteen";
        break;
      case 20:
        std::cout << "twenty";
        break;
    }
  } else {
    switch (first_digit) {
      case 1:
        if (second_digit == 0) std::cout << "ten";
        break;
      case 2:
        std::cout << "twenty";
        break;
      case 3:
        std::cout << "thirty";
        break;
      case 4:
        std::cout << "forty";
        break;
      case 5:
        std::cout << "fifty";
        break;
      case 6:
        std::cout << "sixty";
        break;
      case 7:
        std::cout << "seventy";
        break;
      case 8:
        std::cout << "eighty";
        break;
      case 9:
        std::cout << "ninety";
        break;
      case 10:
        std::cout << "one hundred";
        break;
    }
    if (first_digit > 1 && number != 100 && number % 10 != 0) std::cout << "-";
    switch (second_digit) {
      case 1:
        std::cout << "one";
        break;
      case 2:
        std::cout << "two";
        break;
      case 3:
        std::cout << "three";
        break;
      case 4:
        std::cout << "four";
        break;
      case 5:
        std::cout << "five";
        break;
      case 6:
        std::cout << "six";
        break;
      case 7:
        std::cout << "seven";
        break;
      case 8:
        std::cout << "eight";
        break;
      case 9:
        std::cout << "nine";
        break;
      default:
        break;
    }
  }
  return 0;
}
