/*
 * 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.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;


public class App {
	public static void main (String[] args){
		
		try{
			FileInputStream fstream = new FileInputStream("input.in");
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
		
			int cases = Integer.parseInt(br.readLine());
			String output = "";
			
			for(int i=1;i<=cases;i++){
				String line = br.readLine();
				String[] arr = line.split(" ");
				
				int a = Integer.parseInt(arr[0]);
				int b = Integer.parseInt(arr[1]);
				
				int count = RecyclePair.Calculate(a, b);
				
				output += "Case #"+i+": "+count;
				
				if(i+1 <= cases){
					output += "\n";
				}
			}
			
			in.close();
			System.out.println(output);
			
			FileWriter fwstream = new FileWriter("output.out");
			BufferedWriter out = new BufferedWriter(fwstream);
			out.write(output);
			out.close();
		}
		catch (Exception e) {
			
		}
		
	}
}
