#include <bits/stdc++.h>
using namespace std;
int main() {
  long long p = 1, q = 0, r = 0, o = 0, g = 0, n, m = 1, w, k, l, d = 0, i,
            j = 1, flag = 0, t;
  int s;
  cin >> s;
  if (s == 0) {
    cout << "zero\n";
    return 0;
  }
  if (s / 10 == 2) cout << "twenty";
  if (s / 10 == 3) cout << "thirty";
  if (s / 10 == 4) cout << "forty";
  if (s / 10 == 5) cout << "fifty";
  if (s / 10 == 6) cout << "sixty";
  if (s / 10 == 7) cout << "seventy";
  if (s / 10 == 8) cout << "eighty";
  if (s / 10 == 9) cout << "ninety";
  if (s / 10 != 0 && s / 10 != 1 && s != 20 && s % 10 != 0) cout << "-";
  if (s / 10 != 1) {
    if (s % 10 == 1) cout << "one\n";
    if (s % 10 == 2) cout << "two\n";
    if (s % 10 == 3) cout << "three\n";
    if (s % 10 == 4) cout << "four\n";
    if (s % 10 == 5) cout << "five\n";
    if (s % 10 == 6) cout << "six\n";
    if (s % 10 == 7) cout << "seven\n";
    if (s % 10 == 8) cout << "eight\n";
    if (s % 10 == 9) cout << "nine\n";
  }
  if (s == 10) cout << "ten\n";
  if (s == 11) cout << "eleven\n";
  if (s == 12) cout << "twelve\n";
  if (s == 13) cout << "thirteen\n";
  if (s == 14) cout << "fourteen\n";
  if (s == 15) cout << "fifteen\n";
  if (s == 16) cout << "sixteen\n";
  if (s == 17) cout << "seventeen\n";
  if (s == 18) cout << "eighteen\n";
  if (s == 19) cout << "nineteen\n";
  return 0;
}
