import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package javaapplication2;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 *
 * @author Prabhath
 */
public class Main {

    public static void main(String[] args) {
        // TODO code application logic here
        Scanner scanner = null;
        PrintWriter writer=null;
        try{
             scanner = new Scanner(new FileInputStream("E:\\c.in"));
        writer=new PrintWriter(new FileOutputStream("E:\\c.out"), true);
        }catch(Exception e){

        }
        int n = Integer.parseInt(scanner.nextLine());
        for (int k = 0; k < n; k++) {
            String temp[]=scanner.nextLine().split(" ");
            int a = Integer.parseInt(temp[0]);
            int b = Integer.parseInt(temp[1]);
            int count = 0;

            for (int i = a; i <= b; i++) {
                for (int j = i + 1; j <= b; j++) {
                    if (check(String.valueOf(i), String.valueOf(j))) {
                        count++;
                    }
                }
            }

            writer.println("Case #"+(k+1)+": "+count);

            

        }
writer.close();




    }

    public static boolean check(String x, String y) {
        String a = "";
        String b = "";

        for (int i = 1; i < x.length(); i++) {
            a = x.substring(0, i);
            b = x.substring(i, x.length());
            if (y.equals(b + a)) {
                return true;
            }
        }
        return false;
    }
}
