/*
 * 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.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.*;

public class Main
{
    public static void main(String[] args)
            throws Exception
    {
        BufferedReader in = new BufferedReader(new FileReader(args[0]));
        FileWriter out = new FileWriter(args[1]);
        int T = Integer.parseInt(in.readLine());

        for (int t = 1; t <= T; t++)
        {
            String data[] = in.readLine().split("\\ ");
            int A = Integer.parseInt(data[0]);
            int B = Integer.parseInt(data[1]);

            Set<Integer> checked = new LinkedHashSet<Integer>();

            int recycledPairNumber = 0;

            for (int i = A; i <= B; i++)
            {
                if (checked.contains(i))
                    continue;

                String s = Integer.toString(i);
                String ss = s + s;

                Set<Integer> recycled = new LinkedHashSet<Integer>();
                recycled.add(i);
                for (int j = 0; j < s.length(); j++)
                {
                    int candidate = Integer.parseInt(ss.substring(j, j + s.length()));
                    if (candidate >= A && candidate <= B)
                        recycled.add(candidate);
                }

                if (recycled.size() == 1)
                    continue;

                checked.addAll(recycled);

                recycledPairNumber += (recycled.size() * (recycled.size() - 1)) / 2;
            }

            out.write("Case #" + t + ": " + recycledPairNumber + "\n");
        }

        in.close();
        out.close();
    }
}
