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.FileOutputStream;
import java.io.PrintStream;
import java.util.Scanner;


public class CodeJamWriter implements ICounterZeroEvent{
	
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\A-test";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\A-small-attempt0";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\B-test";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\B-small-attempt0";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\B-large";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\C-test";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\C-small-attempt0";
	public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\C-large";
	
	public int T;
	public Result[] results;

	public static void main(String[] args) {
		CodeJamWriter codeJamWriter = new CodeJamWriter();
		codeJamWriter.readInput();
	}

	private void readInput() {
		Scanner scanner = null;
		File input = new File(inputFile+".in");
		try {
			scanner = new Scanner(input);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		T = scanner.nextInt();
		scanner.nextLine();
		results = new Result[T+1];
		Counter counter = new Counter(T, this);
		for (int i=1;i<=T;++i)
		{
			results[i] = new Result(i);
			Question q = new QuestionC(results[i], counter);
			q.readInput(scanner);
			q.start();
		}
		scanner.close();	
	}

	private void writeOutput() {
		FileOutputStream fos = null;
		PrintStream printer = null;
		File output = new File(inputFile+".out");
		try {
			fos = new FileOutputStream(output);
			printer = new PrintStream(fos);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		for (int i=1;i<=T;++i)
		{
			printer.println(results[i]);
		}
		System.out.println("FINISHED!!!");
		
		printer.close();
		
	}

	@Override
	public void fireEvent() {
		writeOutput();		
	}
	
}
