#include <bits/stdc++.h>
using namespace std;
const string C1[] = {"00",    "10",    "twenty",  "thirty", "forty",
                     "fifty", "sixty", "seventy", "eighty", "ninety"};
const string C2[] = {"zero",    "one",     "two",       "three",    "four",
                     "five",    "six",     "seven",     "eight",    "nine",
                     "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                     "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
int n;
int main() {
  ios_base::sync_with_stdio(false);
  cin >> n;
  if (n <= 19) {
    int b = n;
    cout << C2[b];
  } else {
    int a = n / 10, b = n % 10;
    if (b > 0)
      cout << C1[a] << "-" << C2[b];
    else
      cout << C1[a];
  }
  return 0;
}
