#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0), cin.tie(0);
  int t = 1;
  while (t--) {
    int n;
    cin >> n;
    string p[] = {"zero", "one",   "two",   "three", "four", "five",
                  "six",  "seven", "eight", "nine",  "ten"};
    string s[] = {"",      "",      "twenty",  "thirty", "forty",
                  "fifty", "sixty", "seventy", "eighty", "ninety"};
    if (n == 0) cout << "zero\n";
    if (n == 10) cout << "ten\n";
    if (n == 11) cout << "eleven\n";
    if (n == 12) cout << "twelve\n";
    if (n == 13) cout << "thirteen\n";
    if (n == 14) cout << "fourteen\n";
    if (n == 15) cout << "fifteen\n";
    if (n == 16) cout << "sixteen\n";
    if (n == 17) cout << "seventeen\n";
    if (n == 18) cout << "eighteen\n";
    if (n == 19)
      cout << "nineteen\n";
    else if (n >= 20 || n <= 9) {
      cout << s[n / 10];
      if (n % 10 && n / 10)
        cout << "-" << p[n % 10];
      else if (n % 10 && n / 10 == 0) {
        cout << p[n % 10];
      }
    }
  }
}
