/*
 * 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;
    }
}

package c;
import java.io.*;
/**
 * Google Code Jam C
 * @author hang
 *
 */

public class Main {
	public static void main(String args[]) throws IOException
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String n_str = br.readLine();
		int n_int = Integer.parseInt(n_str);
		int min, max;
		for(int i = 1;i<=n_int;i++)
		{
			String []s = br.readLine().split("\\s");
			int length = s[0].length();
			min = Integer.parseInt(s[0]);
			max = Integer.parseInt(s[1]);
			if(max<10)
			{
				System.out.println("Case #" + i + ": " + 0);
				continue;
			}
		    
			int number = 0;
			
			int multiple_base = 1;
			for(int j = 1;j<length;j++)
				multiple_base*=10;
			for(int k = min;k<max;k++)
			{
				int multiple_increase = 1;
				int multiple_decrease = multiple_base;
				for(int j = 1;j<=length-1;j++)
				{
					multiple_increase*=10;
					int new_number = (k/multiple_increase) + (k%multiple_increase)*multiple_decrease;
					if(new_number>k&&new_number<=max)
						number++;
					multiple_decrease/=10;
				}
			}
			System.out.println("Case #" + i + ": " + number);
			
		}
	}
}
