#include <bits/stdc++.h>
using namespace std;
int main() {
  map<int, string> M, M1;
  M[2] = "twenty";
  M[3] = "thirty";
  M[4] = "forty";
  M[5] = "fifty";
  M[6] = "sixty";
  M[7] = "seventy";
  M[8] = "eighty";
  M[9] = "ninety";
  M[0] = "";
  M1[0] = "zero";
  M1[1] = "one";
  M1[2] = "two";
  M1[3] = "three";
  M1[4] = "four";
  M1[5] = "five";
  M1[6] = "six";
  M1[7] = "seven";
  M1[8] = "eight";
  M1[9] = "nine";
  int n;
  cin >> n;
  if (n < 10)
    cout << M1[n] << endl;
  else {
    if (n == 10) {
      cout << "ten" << endl;
    }
    if (n == 11) {
      cout << "eleven" << endl;
    }
    if (n == 12) {
      cout << "twelve" << endl;
    }
    if (n == 13) {
      cout << "thirteen" << endl;
    }
    if (n == 14) {
      cout << "fourteen" << endl;
    }
    if (n == 15) {
      cout << "fifteen" << endl;
    }
    if (n == 16) {
      cout << "sixteen" << endl;
    }
    if (n == 17) {
      cout << "seventeen" << endl;
    }
    if (n == 18) {
      cout << "eighteen" << endl;
    }
    if (n == 19) {
      cout << "nineteen" << endl;
    }
    if (n == 20) {
      cout << "twenty" << endl;
    }
    if (n >= 21) {
      if (n % 10)
        cout << M[n / 10] << "-" << M1[n % 10] << endl;
      else
        cout << M[n / 10] << endl;
    }
  }
  return 0;
}
