#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  int s;
  scanf("%d", &s);
  string a[20] = {"zero",    "one",     "two",       "three",    "four",
                  "five",    "six",     "seven",     "eight",    "nine",
                  "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                  "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
  string b[8] = {"twenty", "thirty",  "forty",  "fifty",
                 "sixty",  "seventy", "eighty", "ninety"};
  if (s <= 19)
    cout << a[s] << endl;
  else {
    int t1 = s % 10;
    s = s / 10;
    int t2 = s % 10;
    if (t1 != 0)
      cout << b[t2 - 2] << "-" << a[t1] << endl;
    else
      cout << b[t2 - 2] << endl;
  }
  return 0;
}
