#include <bits/stdc++.h>
using namespace std;
void prnt(int 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 == 30) cout << "thirty";
  if (n == 40) cout << "forty";
  if (n == 50) cout << "fifty";
  if (n == 60) cout << "sixty";
  if (n == 70) cout << "seventy";
  if (n == 80) cout << "eighty";
  if (n == 90) cout << "ninety";
}
int main() {
  int n;
  cin >> n;
  if (n <= 20)
    prnt(n);
  else {
    int a = n % 10;
    n -= a;
    prnt(n);
    if (a != 0) {
      cout << "-";
      prnt(a);
    }
  }
  cout << endl;
}
