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

import java.io.File;
import java.io.FileInputStream;
import java.util.Scanner;

/**
 *
 * @author imgps
 */
public class C {
    public static void main(String args[]) throws Exception{
        int A,B;
        int ctr = 0;
        int testCases;
        
        Scanner sc = new Scanner(new FileInputStream("C-small-attempt0.in "));
        testCases = sc.nextInt();
        int input[][] = new int[testCases][2];
        for(int i=0;i<testCases;i++)
        {
          //  System.out.print("Enter input A B: ");
            input[i][0] = sc.nextInt();
            input[i][1] = sc.nextInt();
            
        }
  

for(int k=0;k<testCases;k++){
      ctr = 0;
      A = input[k][0];
      B = input[k][1];
        for(int i = A;i<=B;i++){
            int num = i;
            int nMul = 1;
            int mul = 1; 
            int tnum = num/10;
            while(tnum > 0){
                mul = mul *10;
                tnum= tnum/10;
            }
            tnum = num;
            int n = 0;
            while(tnum > 0 && mul >= 10){
                nMul = nMul * 10;
                n = (num % nMul) * mul + (num / nMul);
                mul = mul / 10;
                tnum = tnum / 10;
                for(int m=num;m<=B;m++){
                    
                    if(n == m && m > num){
                        ctr++;
                    }
                }
                
                
                
         
            }
        }
        System.out.println("Case #"+(k+1)+": "+ctr);
        
    }
    }
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

public class Tools<T>
{

	public static ArrayList<String[]> getInput(String filename) throws IOException
	{
		BufferedReader br = new BufferedReader(new FileReader(filename));

		ArrayList<String[]> output = new ArrayList<String[]>();

		String line;
		while ((line = br.readLine()) != null)
			output.add(line.split(" "));

		br.close();
		return output;
	}
	
	public static ArrayList<String> getInputSingle(String filename) throws IOException
	{
		BufferedReader br = new BufferedReader(new FileReader(filename));

		ArrayList<String> output = new ArrayList<String>();

		String line;
		while ((line = br.readLine()) != null)
			output.add(line);

		br.close();
		return output;
	}

	public static void saveOutput(String filename, ArrayList<String[]> output) throws IOException
	{
		BufferedWriter bw = new BufferedWriter(new FileWriter(filename));
		
		for(int i=0; i<output.size();i++)
		{
			if(i!=0) bw.newLine();
			for(int j=0;j<output.get(i).length;j++)
			{
				if(j!=0) bw.write(" ");
				bw.write(output.get(i)[j]);				
			}
		}
		
		bw.close();
	}
	
	public static void saveOutputSingle(String filename, ArrayList<String> output) throws IOException
	{
		BufferedWriter bw = new BufferedWriter(new FileWriter(filename));
		
		for(int i=0; i<output.size();i++)
		{
			if(i!=0) bw.newLine();
			bw.write(output.get(i));	
		}
		
		bw.close();
	}
}
