#include <bits/stdc++.h>
using namespace std;
string a[] = {"zero", "one", "two",   "three", "four",
              "five", "six", "seven", "eight", "nine"};
string b[] = {"ten",   "twenty",  "thirty", "forty", "fifty",
              "sixty", "seventy", "eighty", "ninety"};
string c[] = {"eleven",  "twelve",    "thirteen", "fourteen", "fifteen",
              "sixteen", "seventeen", "eighteen", "nineteen"};
int main() {
  int n;
  cin >> n;
  if (n < 10) {
    cout << a[n] << endl;
    return 0;
  } else {
    if (n % 10 == 0) {
      cout << b[(n / 10) - 1] << endl;
      return 0;
    } else if (n > 10 && n < 20) {
      cout << c[(n % 10) - 1] << endl;
      return 0;
    } else {
      cout << b[(n / 10) - 1] << "-" << a[n % 10] << endl;
    }
  }
  return 0;
}
