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