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.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;


public class CodeJam2012C
{
	public static void main(String [] args) throws FileNotFoundException
	{
		new CodeJam2012C().go();
	}
	
	public void go() throws FileNotFoundException
	{
		PrintWriter writer = new PrintWriter(new File("output.txt"));
		Scanner in = new Scanner(new File("C-large.in"));
//		Scanner in = new Scanner(System.in);
		int iterations = in.nextInt();
		for (int i = 0; i < iterations; i++)
		{
			int A = in.nextInt();
			int B = in.nextInt();
			int counter = 0;
			for (int j = 0; j < (B - A); j++)
			{
				String s = (j + A) + "";
				for (int k = 0; k < s.length() - 1; k++)
				{
					s = s.substring(1) + s.charAt(0);
					int temp = Integer.parseInt(s);
					if (temp <= B && (j + A) < temp)
						counter++;
				}
			}
//			System.out.println("Case #" + (i + 1) + ": " + counter);
			writer.write("Case #" + (i + 1) + ": " + counter + "\n");
		}
		writer.flush();
		writer.close();
	}
}
