#include <bits/stdc++.h>
using namespace std;
int n;
string txt1[10] = {"zero", "one", "two",   "three", "four",
                   "five", "six", "seven", "eight", "nine"};
string txt2[10] = {"",      "ten",   "twenty",  "thirty", "forty",
                   "fifty", "sixty", "seventy", "eighty", "ninety"};
string txt3[10] = {"",        "eleven",  "twelve",    "thirteen", "fourteen",
                   "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
int main() {
  cin >> n;
  if (n <= 9)
    cout << txt1[n];
  else if (n % 10 == 0)
    cout << txt2[n / 10];
  else if (n > 10 && n <= 19)
    cout << txt3[n - 10];
  else
    cout << txt2[n / 10] << "-" << txt1[n % 10];
  return 0;
}
