#include <bits/stdc++.h>
using namespace std;
const int oo = 1e9;
string a[] = {"zero", "one", "two",   "three", "four",
              "five", "six", "seven", "eight", "nine"};
string b[] = {"ten",     "eleven",  "twelve",    "thirteen", "fourteen",
              "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
string c[] = {"",      "",      "twenty",  "thirty", "forty",
              "fifty", "sixty", "seventy", "eighty", "ninety"};
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  if (n < 10) {
    cout << a[n] << '\n';
  } else if (n < 20) {
    cout << b[n - 10] << '\n';
  } else {
    int x = n / 10, y = n % 10;
    cout << c[x];
    if (y) cout << "-" << a[y];
    cout << '\n';
  }
  return 0;
}
