#include <bits/stdc++.h>
using namespace std;
int main() {
  char s[3];
  while (cin >> s) {
    int l = strlen(s);
    string a[] = {"twenty", "thirty",  "forty",  "fifty",
                  "sixty",  "seventy", "eighty", "ninety"};
    string b[] = {"zero", "one", "two",   "three", "four",
                  "five", "six", "seven", "eight", "nine"};
    if (l == 1) {
      for (int i = 0; i < 10; i++)
        if ((s[0] - 48) == i) cout << b[i] << endl;
    } else if (l == 2) {
      if (s[0] != '1') {
        for (int i = 2; i <= 9; i++) {
          if ((s[0] - 48) == i) {
            for (int j = 1; j < 10; j++) {
              if ((s[1] - 48) == j) cout << a[i - 2] << "-" << b[j] << endl;
            }
            if ((s[1] - 48) == 0) cout << a[i - 2] << endl;
          }
        }
      } else if (s[0] == '1') {
        if (s[1] == '0') cout << "ten" << endl;
        if (s[1] == '1') cout << "eleven" << endl;
        if (s[1] == '2') cout << "twelve" << endl;
        if (s[1] == '3') cout << "thirteen" << endl;
        if (s[1] == '4') cout << "fourteen" << endl;
        if (s[1] == '5') cout << "fifteen" << endl;
        if (s[1] == '6') cout << "sixteen" << endl;
        if (s[1] == '7') cout << "seventeen" << endl;
        if (s[1] == '8') cout << "eighteen" << endl;
        if (s[1] == '9') cout << "nineteen" << endl;
      }
    }
  }
  return 0;
}
