#include <bits/stdc++.h>
using namespace std;
string ut[10] = {"zero", "one", "two",   "three", "four",
                 "five", "six", "seven", "eight", "nine"};
string t[10] = {"ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
string at[8] = {"twenty", "thirty",  "forty",  "fifty",
                "sixty",  "seventy", "eighty", "ninety"};
int main() {
  int n;
  cin >> n;
  if (n < 10)
    cout << ut[n];
  else if (n < 20)
    cout << t[n % 10];
  else if (n % 10 == 0)
    cout << at[n / 10 - 2];
  else
    cout << at[n / 10 - 2] << "-" << ut[n % 10];
  cout << endl;
}
