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));
			
		}
		
		
		

	}
	
	
}
import java.io.*;
import java.util.*;

public class Problem3
{
    static int size = 4;
    public static void main(String args[])
    {
        try
        {
            FileInputStream fstream = new FileInputStream("C-small-attempt0.in");
            DataInputStream in = new DataInputStream(fstream);
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            
            String line;
            int i = 0;
            int num1 = 0, num2 = 0;
            int times;
            Scanner sc;
            int count, total;
            while ((line = br.readLine()) != null)
            {
                if(i == 0)
                {
                    total = Integer.parseInt(line);
                    i = 1;
                    continue;
                }
                sc = new Scanner(line);
                if(sc.hasNextInt()) num1 = sc.nextInt();
                if(sc.hasNextInt()) num2 = sc.nextInt();
                size = (num1==0)?1:(int)Math.log10(num1) + 1;
                times = solve(num1, num2);
                System.out.println("Case #"+i+": "+times);
                write("Case #"+i+": "+times);
                i++;
            }
            in.close();
        }catch (Exception e){
            System.err.println("Error: " + e.getMessage());
        }       
    }
    
    public static int solve(int num1, int num2)
    {
        int i;
        int count = 0;
        int generated;
        for(i = num1; i <= num2; i++)
        {
            for(int j = 1; j < size; j++)
            {
                generated = generate(i, j);
                if(num1 <= i && i < generated && generated <= num2) 
                {
                    count++;
                }
            }
        }
        return count;
    }
    
    public static int generate(int i, int j)
    {
        int temp = i;
        int putfor = temp % (power(10, j));
        int last = temp / (power(10, j));
        int generated = putfor*power(10, size-1-(j-1)) + last;
        return generated;
    }
    
    public static int power(int i, int j)
    {
        int power = 1;
        for(int k = 0; k < j; k++)
        {
            power *= i;
        }
        return power;
    }
    
    public static void write(String text)
    {
        try
        {
            BufferedWriter bw = new BufferedWriter(new FileWriter(new File("Problem3Output.out"), true));
            bw.write(text);
            bw.newLine();
            bw.close();
        }catch (Exception e) {
            System.err.println("Error: " + e.getMessage());
        }
    }
}