#include <bits/stdc++.h>
const int maxBufSize = (10000000);
using namespace std;
int n;
string str[105];
int main() {
  int i, j, a, b, c;
  str[0] = "zero";
  str[1] = "one";
  str[2] = "two";
  str[3] = "three";
  str[4] = "four";
  str[5] = "five";
  str[6] = "six";
  str[7] = "seven";
  str[8] = "eight";
  str[9] = "nine";
  str[10] = "ten";
  str[11] = "eleven";
  str[12] = "twelve";
  str[13] = "thirteen";
  str[14] = "fourteen";
  str[15] = "fifteen";
  str[16] = "sixteen";
  str[17] = "seventeen";
  str[18] = "eighteen";
  str[19] = "nineteen";
  str[20] = "twenty";
  str[30] = "thirty";
  str[40] = "forty";
  str[50] = "fifty";
  str[60] = "sixty";
  str[70] = "seventy";
  str[80] = "eighty";
  str[90] = "ninety";
  cin >> n;
  a = n % 10;
  if (n <= 20) {
    cout << str[n];
  } else if (a == 0) {
    cout << str[n];
  } else {
    b = (n / 10) * 10;
    cout << str[b] << "-" << str[a];
  }
  return 0;
}
