import java.io.*; 
  
public class Quiz 
{ 
  public static void main(String[] argv) throws Exception 
  { 
    BufferedReader cin; 
    cin = new BufferedReader(new InputStreamReader(System.in)); 
  
    // read an int (see 5.1) using a very lengthy prompt 
    int answer; 
    System.out.println("\n\n\n"); 
    System.out.println("       8"); 
    System.out.println("      +2"); 
    System.out.println("      --"); 
  
    System.out.print("      "); 
    answer = new Double(cin.readLine()).intValue();

        System.out.print("      "); 
    if (answer == 10) 
      System.out.println("Correct!"); 
    else 
      System.out.println("Very good, but a better answer is 10"); 
  } 
}