import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

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

package recyclednumbers;

/**
 *
 * @author vandit
 *//*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.lang.String;
import java.util.HashSet;
import java.util.StringTokenizer;

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

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        String filePathIn = args[0];
        String filePathOut = args[1];
        //String filePathIn = "/home/vandit/Desktop/GoogleCodeJam/Qualifying round/testinput.in";
        //String filePathOut = "/home/vandit/Desktop/GoogleCodeJam/Qualifying round/testOutput.out";
        FileReader fr = null;
        BufferedReader inputFileReader = null;
        FileWriter fw = null;
        BufferedWriter outputFileWriter = null;
        try {
            fr = new FileReader(filePathIn);
            inputFileReader = new BufferedReader(fr);

            fw = new FileWriter(filePathOut);
            outputFileWriter = new BufferedWriter(fw);


            int numberOfTestCases = Integer.parseInt(inputFileReader.readLine());

            for (int i = 0; i < numberOfTestCases; i++) {
                String inputContent = inputFileReader.readLine();
                
                StringTokenizer tokenizer = new StringTokenizer(inputContent);
                int startingNumber = Integer.parseInt(tokenizer.nextToken());
                int endingNumber = Integer.parseInt(tokenizer.nextToken());

                HashSet<Pair> numbers =  new RecycleNumbers().findAllRecycledNumbers(startingNumber,endingNumber);
                
                String outputContent = Integer.toString(numbers.size());
                //String outputContent =
                String output = "Case #" + (i+1) + ": " + outputContent+"\n";
                outputFileWriter.write(output);

            }
        outputFileWriter.flush();

        } catch (Exception ex) {
            ex.printStackTrace();

        } finally {
            try {
                outputFileWriter.close();
                inputFileReader.close();
                fr.close();
                fw.close();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }
}

