#include <bits/stdc++.h>
using namespace std;
int main() {
  string yek[9] = {"one", "two",   "three", "four", "five",
                   "six", "seven", "eight", "nine"};
  string dah[9] = {"ten",   "twenty",  "thirty", "forty", "fifty",
                   "sixty", "seventy", "eighty", "ninety"};
  string exeptions[9] = {"eleven",    "twelve",   "thirteen",
                         "fourteen",  "fifteen",  "sixteen",
                         "seventeen", "eighteen", "nineteen"};
  int a, b;
  cin >> a;
  b = a % 10;
  a /= 10;
  if (a == 0 && b == 0) {
    cout << "zero" << endl;
    return 0;
  }
  if (a == 0) {
    cout << yek[b - 1] << endl;
    return 0;
  }
  if (b == 0) {
    cout << dah[a - 1] << endl;
    return 0;
  }
  if (a == 1) {
    cout << exeptions[b - 1] << endl;
    return 0;
  }
  cout << dah[a - 1] << '-' << yek[b - 1] << endl;
  return 0;
}
