#include <bits/stdc++.h>
unsigned long long mulmod(unsigned long long a, unsigned long long b,
                          unsigned long long c) {
  unsigned long long x = 0, y = a % c;
  while (b > 0) {
    if (b % 2 == 1) {
      x = (x + y) % c;
    }
    y = (y * 2) % c;
    b /= 2;
  }
  return x % c;
}
unsigned long long pow(unsigned long long a, unsigned long long b,
                       unsigned long long c) {
  unsigned long long x = 1, y = a;
  while (b > 0) {
    if (b & 1) x = mulmod(x, y, c);
    y = mulmod(y, y, c);
    b >>= 1;
  }
  return x;
}
bool Miller(unsigned long long p, int iteration) {
  if (p < 2) {
    return false;
  }
  if (p != 2 && p % 2 == 0) {
    return false;
  }
  unsigned long long second = p - 1;
  while (second % 2 == 0) {
    second /= 2;
  }
  for (int i = 0; i < iteration; i++) {
    unsigned long long a = rand() % (p - 1) + 1, temp = second;
    unsigned long long mod = pow(a, temp, p);
    while (temp != p - 1 && mod != 1 && mod != p - 1) {
      mod = mulmod(mod, mod, p);
      temp *= 2;
    }
    if (mod != p - 1 && temp % 2 == 0) {
      return false;
    }
  }
  return true;
}
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  int pos = 0;
  string ans = "";
  string text[2][10] = {{"zero", "one", "two", "three", "four", "five", "six",
                         "seven", "eight", "nine"},
                        {"", "ten-", "twenty-", "thirty-", "forty-", "fifty-",
                         "sixty-", "seventy-", "eighty-", "ninety-"}};
  string tens[9] = {"ten",   "twenty",  "thirty", "forty", "fifty",
                    "sixty", "seventy", "eighty", "ninety"};
  if (n % 10 == 0 && n != 0) {
    cout << tens[(n / 10) - 1] << "\n";
    return 0;
  } else if (n < 20) {
    if (n < 10) {
      cout << text[0][n] << "\n";
    } else {
      switch (n) {
        case 11:
          cout << "eleven\n";
          break;
        case 12:
          cout << "twelve\n";
          break;
        case 13:
          cout << "thirteen\n";
          break;
        case 14:
          cout << "fourteen\n";
          break;
        case 15:
          cout << "fifteen\n";
          break;
        case 16:
          cout << "sixteen\n";
          break;
        case 17:
          cout << "seventeen\n";
          break;
        case 18:
          cout << "eighteen\n";
          break;
        case 19:
          cout << "nineteen\n";
      }
    }
    return 0;
  }
  while (n) {
    int d = n % 10;
    ans.insert(0, text[pos][d]);
    pos++;
    n /= 10;
  }
  cout << ans << "\n";
  return 0;
}
