#include <bits/stdc++.h>
using namespace std;
string A[105];
int main() {
  int n;
  cin >> n;
  A[0] = "zero";
  A[1] = "one";
  A[2] = "two";
  A[3] = "three";
  A[4] = "four";
  A[5] = "five";
  A[6] = "six";
  A[7] = "seven";
  A[8] = "eight";
  A[9] = "nine";
  A[10] = "ten";
  A[11] = "eleven";
  A[12] = "twelve";
  A[13] = "thirteen";
  A[14] = "fourteen";
  A[15] = "fifteen";
  A[16] = "sixteen";
  A[17] = "seventeen";
  A[18] = "eighteen";
  A[19] = "nineteen";
  A[20] = "twenty";
  A[30] = "thirty";
  A[40] = "forty";
  A[50] = "fifty";
  A[60] = "sixty";
  A[70] = "seventy";
  A[80] = "eighty";
  A[90] = "ninety";
  if (n <= 20 || (n % 10) == 0)
    cout << A[n] << endl;
  else
    cout << A[n - (n % 10)] << "-" << A[n % 10] << endl;
  return 0;
}
