#include <bits/stdc++.h>
using namespace std;
string s1[] = {"zero", "one",   "two",   "three", "four", "five",
               "six",  "seven", "eight", "nine",  "ten"};
string s2[] = {"0",     "1",     "twenty",  "thirty", "forty",
               "fifty", "sixty", "seventy", "eighty", "ninety"};
string s3[] = {"0",   "eleven", "twelve", "thir", "four",
               "fif", "six",    "seven",  "eigh", "nine"};
int main() {
  int n;
  scanf("%d", &n);
  if (n <= 10)
    cout << s1[n] << endl;
  else if (n <= 12)
    cout << s3[n - 10] << endl;
  else if (n <= 19)
    cout << s3[n - 10] << "teen" << endl;
  else {
    int a = n / 10, b = n % 10;
    cout << s2[a];
    if (b) {
      cout << "-" << s1[b];
    }
    cout << endl;
  }
  return 0;
}
