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