#include <bits/stdc++.h>
using namespace std;
int main() {
  string s[] = {"zero", "one",   "two",   "three", "four", "five",
                "six",  "seven", "eight", "nine",  "ten"};
  string ss[] = {"twenty", "thirty",  "forty",  "fifty",
                 "sixty",  "seventy", "eighty", "ninety"};
  int num;
  cin >> num;
  if (num <= 10) {
    cout << s[num] << endl;
  } else if (num == 11)
    cout << "eleven" << endl;
  else if (num == 12)
    cout << "twelve" << endl;
  else if (num == 13)
    cout << "thirteen" << endl;
  else if (num == 14)
    cout << "fourteen" << endl;
  else if (num == 15)
    cout << "fifteen" << endl;
  else if (num == 16)
    cout << "sixteen" << endl;
  else if (num == 17)
    cout << "seventeen" << endl;
  else if (num == 18)
    cout << "eighteen" << endl;
  else if (num == 19)
    cout << "nineteen" << endl;
  else {
    int mod = num % 10;
    int div = num / 10;
    if (mod == 0) {
      cout << ss[div - 2] << endl;
    } else {
      cout << ss[div - 2] << "-" << s[mod] << endl;
    }
  }
  return 0;
}
