#include <bits/stdc++.h>
using namespace std;
map<int, string> mapa;
int main() {
  mapa[0] = "zero";
  mapa[1] = "one";
  mapa[2] = "two";
  mapa[3] = "three";
  mapa[4] = "four";
  mapa[5] = "five";
  mapa[6] = "six";
  mapa[7] = "seven";
  mapa[8] = "eight";
  mapa[9] = "nine";
  mapa[10] = "ten";
  mapa[11] = "eleven";
  mapa[12] = "twelve";
  mapa[13] = "thirteen";
  mapa[14] = "fourteen";
  mapa[15] = "fifteen";
  mapa[16] = "sixteen";
  mapa[17] = "seventeen";
  mapa[18] = "eighteen";
  mapa[19] = "nineteen";
  mapa[20] = "twenty";
  mapa[30] = "thirty";
  mapa[40] = "forty";
  mapa[50] = "fifty";
  mapa[60] = "sixty";
  mapa[70] = "seventy";
  mapa[80] = "eighty";
  mapa[90] = "ninety";
  int num;
  cin >> num;
  if (num <= 19) {
    cout << mapa[num] << endl;
  } else if (num % 10 == 0) {
    cout << mapa[num] << endl;
  } else {
    int aux = (num / 10) * 10;
    int rest = num % 10;
    cout << mapa[aux] << "-" << mapa[rest] << endl;
  }
  return 0;
}
