#include <bits/stdc++.h>
using namespace std;
char arr[][20] = {"zero",    "one",     "two",       "three",    "four",
                  "five",    "six",     "seven",     "eight",    "nine",
                  "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                  "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
char arr2[][20] = {"twenty", "thirty",  "forty",  "fifty",
                   "sixty",  "seventy", "eighty", "ninety"};
int main() {
  int num;
  cin >> num;
  if (num < 20) {
    cout << arr[num];
    return 0;
  }
  cout << arr2[num / 10 - 2];
  if (num % 10 == 0) {
    return 0;
  }
  cout << "-" << arr[num % 10];
}
