#include <bits/stdc++.h>
using namespace std;
string s[10] = {"zero", "one", "two",   "three", "four",
                "five", "six", "seven", "eight", "nine"};
string s2[10] = {"",      "",      "twenty",  "thirty", "forty",
                 "fifty", "sixty", "seventy", "eighty", "ninety"};
int main() {
  ios_base::sync_with_stdio(0);
  int n;
  cin >> n;
  if (n < 10) {
    cout << s[n];
  } else if (n >= 10 && n < 20) {
    if (n == 10) {
      cout << "ten" << endl;
    } else if (n == 11)
      cout << "eleven" << endl;
    else if (n == 12)
      cout << "twelve" << endl;
    else if (n == 13)
      cout << "thirteen" << endl;
    else if (n == 14)
      cout << "fourteen" << endl;
    else if (n == 15)
      cout << "fifteen" << endl;
    else if (n == 16)
      cout << "sixteen" << endl;
    else if (n == 17)
      cout << "seventeen" << endl;
    else if (n == 18)
      cout << "eighteen" << endl;
    else
      cout << "nineteen" << endl;
  } else {
    if (n % 10 == 0)
      cout << s2[n / 10] << endl;
    else
      cout << s2[n / 10] << "-" << s[n % 10] << endl;
  }
}
