#include <bits/stdc++.h>
const int s = 10 + 1e5;
using namespace std;
string s1(int x) {
  if (x == 0) return "zero";
  if (x == 1) return "one";
  if (x == 2) return "two";
  if (x == 3) return "three";
  if (x == 4) return "four";
  if (x == 5) return "five";
  if (x == 6) return "six";
  if (x == 7) return "seven";
  if (x == 8) return "eight";
  if (x == 9) return "nine";
}
string s2(int x) {
  if (x == 2) return "twenty";
  if (x == 3) return "thirty";
  if (x == 4) return "forty";
  if (x == 5) return "fifty";
  if (x == 6) return "sixty";
  if (x == 7) return "seventy";
  if (x == 8) return "eighty";
  if (x == 9) return "ninety";
}
string s3(int x) {
  if (x == 10) return "ten";
  if (x == 11) return "eleven";
  if (x == 12) return "twelve";
  if (x == 13) return "thirteen";
  if (x == 14) return "fourteen";
  if (x == 15) return "fifteen";
  if (x == 16) return "sixteen";
  if (x == 17) return "seventeen";
  if (x == 18) return "eighteen";
  if (x == 19) return "nineteen";
}
int main() {
  int x;
  cin >> x;
  if (x < 10) {
    cout << s1(x);
  } else if (x >= 10 && x < 20) {
    cout << s3(x);
  } else {
    cout << s2(x / 10);
    if (x % 10 != 0) {
      cout << "-" << s1(x % 10);
    }
  }
  return 0;
}
