#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int ost, desyat;
  ost = n % 10;
  desyat = n / 10;
  if (n == 0) {
    cout << "zero";
    return 0;
  }
  if (n >= 10 && n < 20) {
    switch (n) {
      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;
    }
    return 0;
  }
  switch (desyat) {
    case 1:
      cout << "ten";
      break;
    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;
  }
  if (desyat != 0 && ost != 0) cout << "-";
  switch (ost) {
    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;
  }
  cout << endl;
}
