#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, x;
  cin >> n;
  x = n % 10;
  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 if (n >= 20 && n < 30) {
    cout << "twenty";
    if (x == 0) return 0;
  } else if (n >= 30 && n < 40) {
    cout << "thirty";
    if (x == 0) return 0;
  } else if (n >= 40 && n < 50) {
    cout << "forty";
    if (x == 0) return 0;
  } else if (n >= 50 && n < 60) {
    cout << "fifty";
    if (x == 0) return 0;
  } else if (n >= 60 && n < 70) {
    cout << "sixty";
    if (x == 0) return 0;
  } else if (n >= 70 && n < 80) {
    cout << "seventy";
    if (x == 0) return 0;
  } else if (n >= 80 && n < 90) {
    cout << "eighty";
    if (x == 0) return 0;
  } else if (n >= 90) {
    cout << "ninety";
    if (x == 0) return 0;
  }
  if (x == 1 && n >= 20)
    cout << "-one" << endl;
  else if (x == 2 && n >= 20)
    cout << "-two" << endl;
  else if (x == 3 && n >= 20)
    cout << "-three" << endl;
  else if (x == 4 && n >= 20)
    cout << "-four" << endl;
  else if (x == 5 && n >= 20)
    cout << "-five" << endl;
  else if (x == 6 && n >= 20)
    cout << "-six" << endl;
  else if (x == 7 && n >= 20)
    cout << "-seven" << endl;
  else if (x == 8 && n >= 20)
    cout << "-eight" << endl;
  else if (x == 9 && n >= 20)
    cout << "-nine" << endl;
}
