#include <bits/stdc++.h>
using namespace std;
string num[21] = {"zero",    "one",     "two",       "three",    "four",
                  "five",    "six",     "seven",     "eight",    "nine",
                  "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                  "fifteen", "sixteen", "seventeen", "eighteen", "nineteen",
                  "twenty"};
string ten[8] = {"twenty", "thirty",  "forty",  "fifty",
                 "sixty",  "seventy", "eighty", "ninety"};
int n;
int main() {
  cin >> n;
  if (n <= 20)
    cout << num[n] << endl;
  else if (n % 10 == 0)
    cout << ten[n / 10 - 2] << endl;
  else
    cout << ten[n / 10 - 2] << "-" << num[n % 10] << endl;
  return 0;
}
