#include <bits/stdc++.h>
using namespace std;
int n;
int main() {
  cin >> n;
  if (n < 20) {
    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";
    else if (n == 10)
      cout << "ten";
    else if (n == 11)
      cout << "eleven";
    else if (n == 12)
      cout << "twelve";
    else if (n == 13)
      cout << "thirteen";
    else if (n == 14)
      cout << "fourteen";
    else if (n == 15)
      cout << "fifteen";
    else if (n == 16)
      cout << "sixteen";
    else if (n == 17)
      cout << "seventeen";
    else if (n == 18)
      cout << "eighteen";
    else if (n == 19)
      cout << "nineteen";
    else if (n == 0)
      cout << "zero";
  } else if (n % 10 == 0) {
    if (n / 10 == 2)
      cout << "twenty";
    else if (n / 10 == 3)
      cout << "thirty";
    else if (n / 10 == 4)
      cout << "forty";
    else if (n / 10 == 5)
      cout << "fifty";
    else if (n / 10 == 6)
      cout << "sixty";
    else if (n / 10 == 7)
      cout << "seventy";
    else if (n / 10 == 8)
      cout << "eighty";
    else if (n / 10 == 9)
      cout << "ninety";
  } else {
    int x = n / 10;
    int y = n % 10;
    if (x == 2)
      cout << "twenty";
    else if (x == 3)
      cout << "thirty";
    else if (x == 4)
      cout << "forty";
    else if (x == 5)
      cout << "fifty";
    else if (x == 6)
      cout << "sixty";
    else if (x == 7)
      cout << "seventy";
    else if (x == 8)
      cout << "eighty";
    else if (x == 9)
      cout << "ninety";
    cout << "-";
    if (y == 1)
      cout << "one";
    else if (y == 2)
      cout << "two";
    else if (y == 3)
      cout << "three";
    else if (y == 4)
      cout << "four";
    else if (y == 5)
      cout << "five";
    else if (y == 6)
      cout << "six";
    else if (y == 7)
      cout << "seven";
    else if (y == 8)
      cout << "eight";
    else if (y == 9)
      cout << "nine";
  }
  return 0;
}
