1.

/**
 * FWP, Ausgewählte Probleme aus dem ACM Programming Contest, WS10/11
 * Problem: 10929 You can say 11
 * Link: http://uva.onlinejudge.org/index.php?option=com_onlinejudge&page=show_problem&problem=979
 * 
 * @author Anton Pavlushko, IBB7B,  
 * @version 1.0, 10/10/2010
 * 
 * Status : Accepted
 * Runtime: 0.300
 */

import java.io.*;
import java.util.*;
public class Main {
	public static void main(String[] args) throws IOException {
	    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    String current_line = "";
        int difference, length, i;
	    
	     try {
	         while ((current_line=in.readLine())!= null && !current_line.equals("0")) { 
	        	 difference = 0;
	        	 length=current_line.length();
	        	 for(i=0;i<length;i++)
	        		 difference+=(i%2==0?1:-1)*Character.getNumericValue(current_line.charAt(i));
	        	 
	        	 if (difference%11==0)
	        		 System.out.println(current_line+" is a multiple of 11.");
	        	 else
	        		 System.out.println(current_line+" is not a multiple of 11.");
	        	 
	         } // end while 
	       } // end try
	       catch (IOException e) {
	         System.err.println("Error: " + e);
	       }
	}
}