#include <bits/stdc++.h>
using namespace std;
char name[25][10] = {"zero",    "one",     "two",       "three",    "four",
                     "five",    "six",     "seven",     "eight",    "nine",
                     "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                     "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
char nameTen[11][11] = {"zero",  "ten",   "twenty",  "thirty", "forty",
                        "fifty", "sixty", "seventy", "eighty", "ninety"};
int main() {
  int number;
  scanf("%d", &number);
  if (number < 20)
    cout << name[number];
  else {
    cout << nameTen[number / 10];
    if (number % 10 != 0) cout << "-" << name[number % 10];
  }
  cout << endl;
  return 0;
}
