#include <bits/stdc++.h>
using namespace std;
int n;
char str[20][10] = {"zero",   "one",      "two",      "three",
                    "four",   "five",     "six",      "seven",
                    "eight",  "nine",     "ten",      "eleven",
                    "twelve", "thirteen", "fourteen", "fifteen"};
char tenn[20][10] = {"",      "",      "twenty",  "thirty", "forty",
                     "fifty", "sixty", "seventy", "eighty", "ninety"};
int main() {
  cin >> n;
  int x1 = -1, x2 = -1;
  if (n <= 15) {
    cout << str[n];
  } else if (n <= 19) {
    x1 = n % 10;
    if (n == 18)
      cout << "eighteen";
    else
      cout << str[x1] << "teen";
  } else {
    x1 = n / 10;
    cout << tenn[x1];
    if (n % 10) {
      x2 = n % 10;
      cout << "-" << str[x2];
    }
  }
  return 0;
}
