#include <bits/stdc++.h>
using namespace std;
int main() {
  int x;
  cin >> x;
  vector<string> tens, ones, s;
  tens.push_back("");
  tens.push_back("ten");
  tens.push_back("twenty");
  tens.push_back("thirty");
  tens.push_back("forty");
  tens.push_back("fifty");
  tens.push_back("sixty");
  tens.push_back("seventy");
  tens.push_back("eighty");
  tens.push_back("ninety");
  ones.push_back("");
  ones.push_back("one");
  ones.push_back("two");
  ones.push_back("three");
  ones.push_back("four");
  ones.push_back("five");
  ones.push_back("six");
  ones.push_back("seven");
  ones.push_back("eight");
  ones.push_back("nine");
  s.push_back("ten");
  s.push_back("eleven");
  s.push_back("twelve");
  s.push_back("thirteen");
  s.push_back("fourteen");
  s.push_back("fifteen");
  s.push_back("sixteen");
  s.push_back("seventeen");
  s.push_back("eighteen");
  s.push_back("nineteen");
  if (x / 10 == 0) {
    if (x == 0) {
      cout << "zero\n";
      return 0;
    }
    cout << ones[x % 10] << "\n";
  } else if (x / 10 == 1) {
    cout << s[x % 10] << "\n";
  } else {
    if (x % 10 == 0) {
      cout << tens[x / 10] << "\n";
      return 0;
    }
    cout << tens[x / 10] << "-" << ones[x % 10] << "\n";
  }
}
