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