#include <bits/stdc++.h>
using namespace std;
int n;
string f[10] = {"zero", "one", "two",   "three", "four",
                "five", "six", "seven", "eight", "nine"};
string sp[10] = {"ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                 "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
string s[8] = {"twenty", "thirty",  "forty",  "fifty",
               "sixty",  "seventy", "eighty", "ninety"};
string toS(int n) {
  stringstream ss;
  ss << n;
  string r;
  ss >> r;
  return r;
}
string solve(string a) {
  if (n >= 10 && n <= 19) return sp[n - 10];
  string r = "";
  if (n < 10) {
    r += f[a[0] - '0'];
  } else {
    r += s[a[0] - '2'];
    if (a[1] != '0') r += "-" + f[a[1] - '0'];
  }
  return r;
}
int main() {
  cin >> n;
  cout << solve(toS(n)) << endl;
  return 0;
}
