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();
		}
	}
}

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Scanner;

public class GCJ12QRC
{
	private static int a, b, d;
	private static long c;
	private static String output, newline = System.getProperty("line.separator");

	public static void fun()
	{
		String s;
		int i, j, k;
		c = d = 0;
		for(i=a; i>0; i/=10)
			d++;

		for(i=a; i<b; i++) {
			s = "" + i;
			for(j=1; j<d; j++) {
				k = Integer.parseInt(s.substring(j) + s.substring(0, j));
				if(k>i && k<=b) {
					c++;
				}
			}
		}
	}

	public static void main(String[] args) throws IOException
	{
		long t2, t1 = System.currentTimeMillis();
		output = "";
		Scanner sc = new Scanner(new File("C-large.in"));
		int ntc = sc.nextInt();

		for(int w=1; w<=ntc; w++)
		{
			a = sc.nextInt();
			b = sc.nextInt();
			fun();
			output += "Case #" + w + ": " + c + newline;
		}
		sc.close();

		OutputStream fo = new FileOutputStream("C-large.out");
		fo.write(output.getBytes());
		fo.close();
		t2 = System.currentTimeMillis();
		System.out.println( "Time in millis : " + (t2-t1) );
	}
}
