#include <bits/stdc++.h>
using namespace std;
void solve() {
  int n;
  cin >> n;
  string s0[10] = {"zero", "one", "two",   "three", "four",
                   "five", "six", "seven", "eight", "nine"};
  string s1[8] = {"twenty", "thirty",  "forty",  "fifty",
                  "sixty",  "seventy", "eighty", "ninety"};
  string e[10] = {"ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                  "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
  if (n / 10 == 0) {
    cout << s0[n] << endl;
    return;
  }
  if (n >= 10 && n <= 19) {
    cout << e[n % 10] << endl;
    return;
  }
  if (n % 10 == 0) {
    cout << s1[(n / 10) - 2] << endl;
    return;
  }
  cout << s1[(n / 10) - 2] << "-" << s0[n % 10] << endl;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  int tc = 1;
  while (tc--) {
    solve();
  }
  return 0;
}
