/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package recyclednumbers;

import java.util.HashSet;

/**
 *
 * @author vandit
 */
public class RecycleNumbers {

    private HashSet<String> numbers = new HashSet<String>();
    private HashSet<String> initialTempNumbers = new HashSet<String>();
    private HashSet<String> finalTempNumbers = new HashSet<String>();

    HashSet<Pair> numberPairs = new HashSet<Pair>();


    private void findRecycledNumbers(int start, int end, int places) {


        for (int i = start; i <= end; i++) {
            String initialNumber = Integer.toString(i);
            //if (!(numbers.contains(initialNumber) || finalTempNumbers.contains(initialNumber))) {

                StringBuffer tempNumber = new StringBuffer(initialNumber);
                int len = tempNumber.length();
                int startIndexToMove = len - places;
                String tempString = tempNumber.substring(startIndexToMove);
                if ((places == 1 && tempString.equals("0")) || tempString.charAt(0) == '0') {
                    continue;
                }
                tempNumber.delete(startIndexToMove, len);
                String finalTempNumber = tempString + tempNumber.toString();

                if (! (finalTempNumber.equals(initialNumber) || Integer.parseInt(finalTempNumber) > end || Integer.parseInt(finalTempNumber) < Integer.parseInt(initialNumber))) {
                    numbers.add(initialNumber);
                    finalTempNumbers.add(finalTempNumber);
                    Pair pair = new Pair(finalTempNumber,initialNumber);
                    numberPairs.add(pair);
                }
            }

        

    }

    public HashSet<Pair> findAllRecycledNumbers(int start, int end) {
        int length = Integer.toString(start).length();
        for (int i = 1; i < length; i++) {
            findRecycledNumbers(start, end, i);
        }
        return numberPairs;
    }
}

import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Scanner;


public class Solver {
	Scanner inFile=null;
	PrintWriter outFile=null;
	int caseNo;
	public Solver(int caseNo){
		this.caseNo=caseNo;
	}
	public void processInput(Scanner inFile,PrintWriter outFile){
		this.inFile=inFile;
		this.outFile=outFile;
		readInput();
		produceoutput();
		
	}
	private void produceoutput() {
       
	
		//outFile.printf("Case #"+caseNo+": %d\n",candidatecount);
		
		
	}
	public void readInput(){
		String s="";
		if(inFile.hasNext()){
			//get the store credit
			int A=Integer.parseInt(inFile.next().trim());
			int B=Integer.parseInt(inFile.next().trim());
			RecycleNumber r=new RecycleNumber(A,B);
			outFile.printf("Case #"+caseNo+": %d\n",r.count);
			if(inFile.hasNext())inFile.nextLine();			
		}
	}

}
