/*
 * 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.Scanner;

public class C {

public static void main(String[] args) throws FileNotFoundException, IOException {
     Scanner sc = new Scanner(new FileReader("input.txt"));
     PrintWriter pw = new PrintWriter(new FileWriter("output.txt"));

        int noOfCases = sc.nextInt();

for (int caseNum = 0; caseNum < noOfCases; caseNum++){
	int A = sc.nextInt();
	int B = sc.nextInt();
	int result =0;
	
	if(A<10){
     pw.print("Case #" + (caseNum + 1) + ": 0");
	}
	else if(A<100){
		for (int i = A; i <= B; i++) {
			if(A<=shift2(i) && shift2(i)<=B  && i != shift2(i)){
				result++;
			}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result/2);
	}
	else if(A<1000){
		for (int i = A; i <= B; i++) {
			if(A<=shift3(i) && shift3(i)<=B && i != shift3(i)){
				result++;
			}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result);
	}
	
	if(caseNum < noOfCases-1)
     	pw.println("");
}
     

     pw.flush();
     pw.close();
     sc.close();
}

public static int shift3(int number){
	int r = number % 10;
	number = number/10;
	number = number + r*100;
	return number;	
}

public static int shift2(int number){
	int r = number % 10;
	number = number/10;
	number = number + r*10;
	return number;	
}
}
