#include <bits/stdc++.h>
using namespace std;
void test_case() {
  string tens[10] = {"",      "",      "twenty",  "thirty", "forty",
                     "fifty", "sixty", "seventy", "eighty", "ninety"};
  string ones[10] = {"zero", "one", "two",   "three", "four",
                     "five", "six", "seven", "eight", "nine"};
  string between[10] = {"eleven",    "twelve",   "thirteen",
                        "fourteen",  "fifteen",  "sixteen",
                        "seventeen", "eighteen", "nineteen"};
  long long int n;
  cin >> n;
  if (n < 10) {
    cout << ones[n % 10];
  } else if (n == 10) {
    cout << "ten";
  } else if (n > 10 && n < 20) {
    cout << between[n % 11];
  } else {
    int ind = n / 10;
    string s = tens[ind];
    if (n % 10) s += "-" + ones[n % 10];
    cout << s;
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  long long int t;
  t = 1;
  while (t--) {
    test_case();
  }
}
