/*
 * 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.*;
import java.util.*;
 
public class test {

    public static void main(String[] args) throws IOException {
 
        // Location of file to read

	functions aa = new functions();
        File file = new File("input.txt");
	Writer output = new BufferedWriter(new FileWriter("output.txt"));
	int i = 1;
	int answer = 0;
	String A = "";
	String B = "";
	int j = 0;
	int n = 0;
	
        try {
 
            Scanner scanner = new Scanner(file);
 	    n = Integer.parseInt((String)scanner.nextLine());
 	    
            while (scanner.hasNextLine()) {
            	A = "";
            	B = "";
                String line = scanner.nextLine();
                while(line.charAt(j) != ' '){
			A = A + line.charAt(j);
			j++;
                }
                j++;
                while(j < line.length()){
			B = B + line.charAt(j);
			j++;
                }
		j = 0;
                answer = aa.solve(A,B);
			if(i < n)
				output.write("Case #" + i +": "+ answer +"\n");
			else
				output.write("Case #" + i +": "+ answer);
		i++;
		
            }
            scanner.close();
            output.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
       }
      }
