#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL), cout.tie(NULL);
  int s;
  cin >> s;
  char str[21][10] = {"zero",    "one",     "two",       "three",    "four",
                      "five",    "six",     "seven",     "eight",    "nine",
                      "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                      "fifteen", "sixteen", "seventeen", "eighteen", "nineteen",
                      "twenty"};
  if (s >= 0 && s <= 20)
    cout << str[s] << endl;
  else if (s > 20 && s <= 30) {
    if (s == 30)
      cout << "thirty" << endl;
    else
      cout << str[20] << "-" << str[s - 20] << endl;
  } else if (s > 30 && s <= 40) {
    if (s == 40)
      cout << "forty" << endl;
    else
      cout << "thirty"
           << "-" << str[s - 30] << endl;
  } else if (s > 40 && s <= 50) {
    if (s == 50)
      cout << "fifty" << endl;
    else
      cout << "forty"
           << "-" << str[s - 40] << endl;
  } else if (s > 50 && s <= 60) {
    if (s == 60)
      cout << "sixty" << endl;
    else
      cout << "fifty"
           << "-" << str[s - 50] << endl;
  } else if (s > 60 && s <= 70) {
    if (s == 70)
      cout << "seventy" << endl;
    else
      cout << "sixty"
           << "-" << str[s - 60] << endl;
  } else if (s > 70 && s <= 80) {
    if (s == 80)
      cout << "eighty" << endl;
    else
      cout << "seventy"
           << "-" << str[s - 70] << endl;
  } else if (s > 80 && s <= 90) {
    if (s == 90)
      cout << "ninety" << endl;
    else
      cout << "eighty"
           << "-" << str[s - 80] << endl;
  } else if (s > 90 && s <= 100) {
    if (s == 100)
      cout << "one hundred" << endl;
    else
      cout << "ninety"
           << "-" << str[s - 90] << endl;
  }
  return 0;
}
