/*
 * 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.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

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

/**
 *
 * @author Karim
 */
public class RecycledNumbers {

    public static boolean checkNumbers(int n, int m){
        String x=""+n;
        String y=""+m;
        for (int i=0;i<x.length()-1;i++){
            String temp=""+x.charAt(x.length()-1);
            String rest=x.substring(0,x.length()-1);
            temp+=rest;
            x=""+temp;
            if (temp.equals(y)){
                return true;
            }
        }
        return false;
    }
    
    public static int range(int a, int b){
        int counter=0;
        for (int i=a;i<b;i++){
            for (int j=(i+1);j<=b;j++){
                if (checkNumbers(i, j)==true)
                    counter++;
            }
        }
        return counter;
    }
    
    public static void main(String[] args) throws FileNotFoundException {
        Scanner r=new Scanner(System.in);
        String s=r.nextLine();
        PrintWriter out=new PrintWriter("RecycledNumbers.out");
        int t=Integer.parseInt(s);
        for (int i=0;i<t;i++){
            String start=r.next();
            String end=r.next();
            int number=range(Integer.parseInt((start)), Integer.parseInt(end));
            out.write("Case #"+(i+1)+": "+number+"\n");
            out.flush();
//            System.out.println("Case #"+(i+1)+": "+number);
        }
    }
}
