import java.util.*;

class Hexadecimal
{
    static Scanner sc= new Scanner (System.in);
    
    public static void main(String[] args)
    {
        String Decimal;
      
        int a,y;
        int [] num= new int[2];
        
      
    {
        System.out.print("Enter a integer: ");
        Decimal= sc.nextLine();
        
        int x= Integer.parseInt(Decimal);
                
        a=0;
        while(x!=0)  
        {  
           y=x%16;  
           x=x/16;  
           num[a]=y;  
           a++;  
        }
        a--;
        
        if (x==num[a]+num[a-1])
        {
           swtich(num[a]+num[a-1]);
           {
            
            case 10:                            //it say tat orphaned case
            System.out.print("A");
            break;
            case 11:
            System.out.print("B");
            break;
            case 12:
            System.out.print("C");
            break;
            case 13:
            System.out.print("D");
            break;
            case 14:
            System.out.print("E");
            break;
            case 15:
            System.out.print("F");
            
        }
    }
        
      
        System.out.print("The hexadecimal form is ");
        for(;a>=0;a--)
        {
            System.out.print(num[a]);
        }
        System.out.println();
    }
}
}