/*
 * 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.HashSet;

public class code33 {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        FileWriter fos = new FileWriter("outfile",false);
        BufferedWriter bw = new BufferedWriter(fos);
        int T=Integer.parseInt(br.readLine()), A , B , j ,i ;
        String str[];
        for(j=1;j<=T; j++)
        {
            str=br.readLine().split(" ");
            A= Integer.parseInt(str[0]); B=  Integer.parseInt(str[1]);
            
            bw.write("Case #"+j+": "+swapncal(A, B)+"\n");
        }
        bw.close();
        
        
    }
    public static int swapncal(int A,int B)
    {
        int n=0, p ,num; 
        String xs; 
        HashSet<Integer> set = new HashSet<Integer>();
        for (int x= A; x <=(A+B); x++)
            {
                set.clear();
                xs=x+"";
                for(p=1;p< xs.length();p++)
                {
                    num=Integer.parseInt(xs.substring(p)+xs.substring(0, p));
                    if( num > x && !set.contains(num) && num >=A && num <=B)
                    {
                        set.add(num);
                        n++;
                    }
                }
                
            }
        return n;
    }
}