#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  long long n = 0, m = 10000007, mn = 1000007, mx = 0, l = 1, r = 0, k = 0,
            j = 0, i = 0, ans = 0;
  cin >> n;
  k = n / 10;
  vector<string> a{"one",     "two",       "three",    "four",     "five",
                   "six",     "seven",     "eight",    "nine",     "ten",
                   "eleven",  "twelve",    "thirteen", "fourteen", "fifteen",
                   "sixteen", "seventeen", "eighteen", "nineteen", "twenty"};
  vector<string> b{"twenty", "thirty",  "forty",  "fifty",
                   "sixty",  "seventy", "eighty", "ninety"};
  if (n == 0) {
    cout << "zero" << endl;
  } else if (n <= 20) {
    cout << a[n - 1] << endl;
  } else if (n > 20 && n % 10 != 0) {
    cout << b[(k % 10) - 2] << '-' << a[(n % 10) - 1] << endl;
  } else {
    cout << b[(k % 10) - 2] << endl;
  }
}
