#include <iostream>
#include <string>

int main()
{
  int number;
  std::cin >> number;
  std::string word;

  switch (number)
  {
    case 0:
      word = "Null";
      break;
    case 1:
      word = "Eins";
      break;
    case 2:
      word = "Zwei";
      break;
    case 3:
      word = "Drei";
      break;
    default:
      std::cerr << "Programmfehler: Unbekannte Zahl!";
      return 1;
  }
  std::cout << word << std::endl;
  return 0;
}