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