#include <bits/stdc++.h>
using namespace std;
void add_unit(string& res, int unit) {
  switch (unit) {
    case 0:
      res += "zero";
      break;
    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";
      break;
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n;
  cin >> n;
  string res;
  if (n >= 20) {
    int d = n / 10;
    switch (d) {
      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";
        break;
    }
    n = n % 10;
    if (n) {
      res += "-";
      add_unit(res, n);
    }
  } else if (n >= 10) {
    int d = n - 10;
    switch (d) {
      case 0:
        res = "ten";
        break;
      case 1:
        res = "eleven";
        break;
      case 2:
        res = "twelve";
        break;
      case 3:
        res = "thirteen";
        break;
      case 4:
        res = "fourteen";
        break;
      case 5:
        res = "fifteen";
        break;
      case 6:
        res = "sixteen";
        break;
      case 7:
        res = "seventeen";
        break;
      case 8:
        res = "eighteen";
        break;
      case 9:
        res = "nineteen";
        break;
    }
  } else {
    add_unit(res, n);
  }
  cout << res << "\n";
  return 0;
}
