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