#include <bits/stdc++.h>
using namespace std;
int n;
string s[20] = {"zero", "one", "two",   "three", "four",
                "five", "six", "seven", "eight", "nine"};
string t[20] = {"ten", "eleven", "twelve", "thirteen", "fourteen"};
string s2[20] = {"twen", "thir", "for", "fif", "six", "seven", "eigh", "nine"};
int main() {
  cin >> n;
  if (n < 10)
    cout << s[n];
  else if (n < 15)
    cout << t[n - 10];
  else if (n < 20)
    cout << s2[n - 12] << "teen";
  else if (n % 10 == 0)
    cout << s2[(n / 10) - 2] << "ty";
  else
    cout << s2[(n / 10) - 2] << "ty-" << s[n % 10];
  return 0;
  getchar();
  getchar();
  return 0;
}
