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