#include <bits/stdc++.h>
using namespace std;
int main() {
  string edin[10], des[10], num[10];
  edin[0] = "zero";
  edin[1] = "one";
  edin[2] = "two";
  edin[3] = "three";
  edin[4] = "four";
  edin[5] = "five";
  edin[6] = "six";
  edin[7] = "seven";
  edin[8] = "eight";
  edin[9] = "nine";
  num[0] = "ten";
  num[1] = "eleven";
  num[2] = "twelve";
  num[3] = "thirteen";
  num[4] = "fourteen";
  num[5] = "fifteen";
  num[6] = "sixteen";
  num[7] = "seventeen";
  num[8] = "eighteen";
  num[9] = "nineteen";
  des[2] = "twenty";
  des[3] = "thirty";
  des[4] = "forty";
  des[5] = "fifty";
  des[6] = "sixty";
  des[7] = "seventy";
  des[8] = "eighty";
  des[9] = "ninety";
  int n;
  cin >> n;
  if (n < 10)
    cout << edin[n];
  else if (n < 20)
    cout << num[n % 10];
  else {
    cout << des[n / 10];
    if (n % 10 != 0) cout << "-" << edin[n % 10];
  }
  return 0;
}
