#include <bits/stdc++.h>
using namespace std;
long long a, b, c;
string solve1(int N) {
  switch (N) {
    case 1:
      return "one";
    case 2:
      return "two";
    case 3:
      return "three";
    case 4:
      return "four";
    case 5:
      return "five";
    case 6:
      return "six";
    case 7:
      return "seven";
    case 8:
      return "eight";
    case 9:
      return "nine";
    case 10:
      return "ten";
    case 11:
      return "eleven";
    case 12:
      return "twelve";
    case 13:
      return "thirteen";
    case 14:
      return "fourteen";
    case 15:
      return "fifteen ";
    case 16:
      return "sixteen";
    case 17:
      return "seventeen";
    case 18:
      return "eighteen";
    default:
      return "nineteen";
  }
}
string solve2(int N) {
  switch (N) {
    case 2:
      return "twenty";
    case 3:
      return "thirty";
    case 4:
      return "forty";
    case 5:
      return "fifty";
    case 6:
      return "sixty";
    case 7:
      return "seventy";
    case 8:
      return "eighty";
    default:
      return "ninety";
  }
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int N;
  cin >> N;
  if (N > 19) {
    cout << solve2(N / 10);
    if (N % 10 && N) {
      cout << "-" << solve1(N % 10) << "\n";
    }
  } else if (N) {
    cout << solve1(N) << "\n";
  }
  if (!N) {
    cout << "zero\n";
  }
  return 0;
}
