#include <bits/stdc++.h>
using namespace std;
int main() {
  string zToN[] = {"zero", "one", "two",   "three", "four",
                   "five", "six", "seven", "eight", "nine"};
  string tToN[] = {"ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                   "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
  string tToNN[] = {"twenty", "thirty",  "forty",  "fifty",
                    "sixty",  "seventy", "eighty", "ninety"};
  int n;
  cin >> n;
  if (n >= 0 && n <= 9)
    cout << zToN[n];
  else if (n >= 10 && n <= 19)
    cout << tToN[n - 10];
  else
    cout << tToNN[(n / 10) - 2];
  if (n % 10 != 0 && n >= 20)
    cout << "-" << zToN[n % 10] << endl;
  else
    cout << endl;
  return 0;
}
