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 google;

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Arber
 */
public class Google {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Path input_path = new File("Input.in").toPath();
        try {
            List<String> input_list = Files.readAllLines(input_path,Charset.forName("UTF-8"));
            int begin = 0;
            while(begin<input_list.size())
            {
                int start = new Integer(input_list.get(begin)).intValue();
                for(int i = 0; i<start; i++)
                {
                    String[] in = input_list.get(begin+i+1).split(" ");
                    System.out.println("Case #"+(i+1)+"; " +google3(new Integer(in[0]).intValue(), new Integer(in[1]).intValue()));
                }
                begin = begin + start + 1;
            }
        } catch (IOException ex) {
            Logger.getLogger(Google.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    
    public static int google3(int n, int m)
    {
        ArrayList<String> a1 = new ArrayList<String>();
        for(int i = n; i<=m; i++)
        {
            for(int j = 1; j<(""+n).length();j++)
            {
                int rec = recycled(""+i, j);
                if(rec>=n &&rec<=m && rec != i)
                {
                    if(rec<i)
                    {
                        String tem = (""+rec)+(""+i);
                        if(!a1.contains(tem))
                            a1.add(tem);
                    }
                    else
                    {
                        String tem = (""+i)+(""+rec);
                        if(!a1.contains(tem))
                            a1.add(tem);
                    }
                }
            }
        }
        return a1.size();
            
    }
    public static int recycled(String s, int m)
    {
        s = s.substring(s.length()-m) + s.substring(0,s.length()-m);
        return new Integer(s).intValue();
    }
}
