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