#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, o, t;
  cin >> n;
  o = n % 10;
  t = n / 10;
  if (n == 0) {
    cout << "zero";
    return 0;
  }
  if (n < 20 && n > 9) {
    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;
    }
  }
  if (n >= 20) {
    switch (t) {
      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 (n <= 9 || n >= 20) {
    if (t != 0 && o != 0) {
      cout << "-";
    }
    switch (o) {
      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;
}
