#include <bits/stdc++.h>
using namespace std;
string ar[] = {"zero",    "one",     "two",       "three",    "four",
               "five",    "six",     "seven",     "eight",    "nine",
               "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
               "fifteen", "sixteen", "seventeen", "eighteen"};
string br[] = {"",      "ten",   "twenty",  "thirty", "forty",
               "fifty", "sixty", "seventy", "eighty", "ninety"};
int main() {
  int q = 1;
  while (q--) {
    int n;
    cin >> n;
    if (n <= 18) {
      cout << ar[n];
      continue;
    }
    if (n < 20) {
      cout << ar[n % 10] << "teen";
      continue;
    }
    int f = n / 10;
    if (n % 10 == 0) {
      cout << br[f];
      continue;
    }
    cout << br[f] << '-' << ar[n % 10];
  }
}
