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