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