#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, cnt = 0;
  cin >> n;
  bool run = false;
  switch (n) {
    case 0:
      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;
    default:
      run = true;
      break;
  }
  if (run) {
    switch (n / 10) {
      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;
      case 9:
        cout << "ninety";
        break;
    }
    switch (n % 10) {
      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;
    }
  }
  return 0;
}
