#include <bits/stdc++.h>
using namespace std;
int i, j, k;
int main() {
  string s1[] = {"zero",    "one",     "two",       "three",    "four",
                 "five",    "six",     "seven",     "eight",    "nine",
                 "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                 "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
  string s2[] = {"",      "",      "twenty",  "thirty", "forty",
                 "fifty", "sixty", "seventy", "eighty", "ninety"};
  int n;
  cin >> n;
  if (n < 20)
    cout << s1[n] << endl;
  else {
    cout << s2[n / 10];
    if (n % 10) cout << "-", cout << s1[n % 10] << endl;
  }
}
