#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n == 0)
    cout << "zero" << endl;
  else if (n == 1)
    cout << "one" << endl;
  else if (n == 2)
    cout << "two" << endl;
  else if (n == 3)
    cout << "three" << endl;
  else if (n == 4)
    cout << "four" << endl;
  else if (n == 5)
    cout << "five" << endl;
  else if (n == 6)
    cout << "six" << endl;
  else if (n == 7)
    cout << "seven" << endl;
  else if (n == 8)
    cout << "eight" << endl;
  else if (n == 9)
    cout << "nine" << endl;
  else 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 if (n == 19)
    cout << "nineteen" << endl;
  else {
    int a = n % 10, b = n / 10;
    n = b;
    if (n == 2)
      cout << "twenty";
    else if (n == 3)
      cout << "thirty";
    else if (n == 4)
      cout << "forty";
    else if (n == 5)
      cout << "fifty";
    else if (n == 6)
      cout << "sixty";
    else if (n == 7)
      cout << "seventy";
    else if (n == 8)
      cout << "eighty";
    else if (n == 9)
      cout << "ninety";
    n = a;
    if (n == 1)
      cout << "-one";
    else if (n == 2)
      cout << "-two";
    else if (n == 3)
      cout << "-three";
    else if (n == 4)
      cout << "-four";
    else if (n == 5)
      cout << "-five";
    else if (n == 6)
      cout << "-six";
    else if (n == 7)
      cout << "-seven";
    else if (n == 8)
      cout << "-eight";
    else if (n == 9)
      cout << "-nine";
    cout << endl;
  }
}
