/*
 * 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.*;
/**
 *
 * @author ankush
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)throws IOException {
        //System.out.println(Math.floor(Math.log10(11)));
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int t=Integer.parseInt(br.readLine());
        int ans[]=new int[t];
        for(int i=0;i<t;i++)
        {
            String x=br.readLine();
            String r[]=new String[2];
            r=x.split(" ");
            int a=Integer.parseInt(r[0]);
            int b=Integer.parseInt(r[1]);
            int count=0;
            for(int j=a;j<=b;j++)
            {
                int p=j/10;
                int m=j%10;
                int q=(int)(Math.floor(Math.log10(j)))+1;
                for(int k=1;k<q;k++)
                {
                     int s=m*(int)(Math.pow(10.0,(q-1)*1.0))+p;
                     int n=(int)(Math.floor(Math.log10(s)))+1;
                    if(s>j && s<=b && n==q)
                    {
                        count++;
                     // System.out.println(j+" "+s+" "+count+" "+p+" "+q+" "+m);
                     }
                    m=s%10;
                    p=s/10;

                }
            }
            ans[i]=count;
        }
        for(int i=0;i<t;i++)
        {
            System.out.println("Case #"+(i+1)+": "+ans[i]);
        }
    }
}