/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
			String name = padRight("balhadeff@bluewin.ch", 20);
			String id = padRight("144751207697", 20);
			StringBuilder out = new StringBuilder();
			for (int i = 0; i < 20; i++) {
				out.append((name.charAt(i) ^ id.charAt(i)) % 10);
			}
            byte[] rawDigest = out.toString().getBytes();
            String digest = md5sumToString(rawDigest);
			System.out.println(digest);
	}
 
	private static String padRight(String up4Padding, int requiredSize) {
		return String.format("%1$-" + requiredSize + "s", up4Padding);
	}
 
	public static String md5sumToString(byte[] digest) {
        StringBuilder result = new StringBuilder();
        for (byte it : digest) {
            result.append(Integer.toString((it & 0xff) + 0x100, 16).substring(1));
        }
        return result.toString();
    }
}

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