#include <bits/stdc++.h>
using namespace std;
int main() {
  unsigned short n;
  cin >> n;
  string y[9] = {"one", "two",   "three", "four", "five",
                 "six", "seven", "eight", "nine"};
  string d[8] = {"twenty", "thirty",  "forty",  "fifty",
                 "sixty",  "seventy", "eighty", "ninety"};
  string t[10] = {"ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                  "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
  if (n == 0)
    cout << "zero";
  else if (n / 10 == 1)
    cout << t[n % 10];
  else if (n < 10)
    cout << y[n % 10 - 1];
  else if (n % 10 != 0)
    cout << d[n / 10 - 2] << '-' << y[n % 10 - 1];
  else
    cout << d[n / 10 - 2];
}
