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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

package midnighter.googlejam.y2012;

import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class QualificationC
{
	static final String inFileName = "inputs/C-large.in";
	static final String outFileName = "outputs/C-large.out";
	

    Scanner in;
    PrintWriter out;
   
    public int oneCase()
    {
    	int A = in.nextInt();
    	int B = in.nextInt();
    	int res = 0;
    	for (int i = A; i <= B; i++)
    	{
    		int d = 1, c = i;
    		while ((c /= 10) > 0)
    			d++;
    		int v = i;
    		for (int k = 0; k < d - 1; k++)
    		{
    			int nw = v % 10;
    			for (int j = 0; j < d - 1; j++)
    				nw *= 10;
    			v = v / 10 + nw;
    			if (v == i)
    				break;
    			if (nw != 0 && v <= B && v > i)
    				res++;
    		}
    	}
    		
    	return res;
    }
   
    public void run() throws Exception
    {
        in = new Scanner(new FileReader(inFileName));
        out = new PrintWriter(new FileWriter(outFileName));
       
        int nCases = in.nextInt();
        in.nextLine();
        for (int c = 1; c <= nCases; c++)
            out.println("Case #" + c + ": " + oneCase());
       
        out.flush();
        out.close();
        in.close();
    }
   
    public static void main(String[] args) throws Exception
    {
        new QualificationC().run();
    }
}
