import java.io.BufferedReader;
   import java.io.IOException;
   import java.io.InputStreamReader;


   public class hexcksum {

      public static void main(String[] args) {
         BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
          System.out.println("Enter the Hexadecimal numbers:");
          String str="0";
         try {
            str = bf.readLine();
         } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         }
         String stringArray[] = str.split(" ",0);
         System.out.println(stringArray.length);
         
         String binary1 = "00000000";
         String binary2 = "00000000";
         String xorValue = "00000000";
         for(int i = 0; i < stringArray.length; i++){
             binary2 = Integer.toBinaryString(Integer.parseInt(stringArray[i].trim(),16));
             xorValue = xor(binary1,binary2);
             binary1 = xorValue;
         }
         
         System.out.println(xorValue);
         int i= Integer.parseInt(xorValue,2);
          String hexString = Integer.toHexString(i);
          System.out.println(hexString);
      }
      
      public static String xor ( String binary1, String binary2 )
       {
         if (binary1.length() < 8) {
            for (int n=binary1.length(); n<8; n++){
               binary1 = "0" + binary1;
            }
         }
         if (binary2.length() < 8) {
            System.out.println(binary2.length());
            for (int n=binary2.length(); n<8; n++){
               binary2 = "0" + binary2;
            }
         }
         
         char[] binary1Array = binary1.toCharArray();
         char[] binary2Array = binary2.toCharArray();
         
         String result = "";
         int xorResult;
         for (int i=0; i<8; i++){
            xorResult = (binary1Array[i] ^ binary2Array[i]);
            result = result.concat(Integer.toString(xorResult));
         }
         
         System.out.println (binary1);
         System.out.println (binary2);
         System.out.println (result + "**");
         return result;
       }
   }