#include <bits/stdc++.h>
using namespace std;
string tens[10] = {"twenty", "thirty",  "forty",  "fifty",
                   "sixty",  "seventy", "eighty", "ninety"};
string once[20] = {"zero",    "one",     "two",       "three",    "four",
                   "five",    "six",     "seven",     "eight",    "nine",
                   "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                   "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
int main() {
  int n, i, j, k;
  cin >> n;
  if (n < 20)
    cout << once[n] << endl;
  else {
    int one = n % 10;
    int ten = n / 10;
    if (one != 0)
      cout << tens[ten - 2] << "-" << once[one] << endl;
    else
      cout << tens[ten - 2] << endl;
  }
  return 0;
}
