#include <bits/stdc++.h>
const long long int MOD = 1000000007;
using namespace std;
vector<string> a;
vector<string> b;
int main() {
  long long int i, j, t, m, n, x, y, sz, ans = 0LL;
  a.push_back("zero");
  a.push_back("one");
  a.push_back("two");
  a.push_back("three");
  a.push_back("four");
  a.push_back("five");
  a.push_back("six");
  a.push_back("seven");
  a.push_back("eight");
  a.push_back("nine");
  a.push_back("ten");
  a.push_back("eleven");
  a.push_back("twelve");
  a.push_back("thirteen");
  a.push_back("fourteen");
  a.push_back("fifteen");
  a.push_back("sixteen");
  a.push_back("seventeen");
  a.push_back("eighteen ");
  a.push_back("nineteen");
  a.push_back("twenty");
  b.push_back("x");
  b.push_back("xx");
  b.push_back("twenty");
  b.push_back("thirty");
  b.push_back("forty");
  b.push_back("fifty");
  b.push_back("sixty");
  b.push_back("seventy");
  b.push_back("eighty");
  b.push_back("ninety");
  b.push_back("xx");
  cin >> n;
  if (n <= 20)
    cout << a[n];
  else {
    cout << b[n / 10];
    if (n % 10 != 0) {
      cout << "-";
      cout << a[n % 10];
    }
  }
  cout << endl;
  return 0;
}
