import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Scanner;
import java.util.TreeSet;

/**
 *
 * @author violetlily
 */
public class Jam2012Q_C_S {

//    private final String ipath = "C-small-attempt0.in";
//    private final String opath = "C-small-attempt0.ou";
    private final String ipath = "C-large.in";
    private final String opath = "C-large.ou";

    public void Handle() throws FileNotFoundException {

        PrintStream out = new PrintStream(   
                new BufferedOutputStream(   
                        new FileOutputStream(opath)));   
        System.setOut(out);

        Scanner sc = new Scanner(new FileInputStream(new File(ipath)));
        int t = sc.nextInt();
        int ii = 1;
        while (t > 0) {

            int a = sc.nextInt();
            int b = sc.nextInt();
            int c = 0;
    
            for (int i = a; i <= b; i++) {
                TreeSet ts = new TreeSet();
                String ta = Integer.toString(i);
                String tb = ta + ta;
                for (int j = 0; j < ta.length(); j++) {
                    int tc = Integer.valueOf(tb.substring(j, j + ta.length()));
                    if (tc > i && tc <= b) {
                        ts.add(tc);
                    }
                }
                c += ts.size();
            }

            System.out.println("Case #" + ii + ": " + c);
            
            ii++;
            t--;
        }
        out.close();
    }

    public static void main(String args[]) throws Exception {
        Jam2012Q_C_S t = new Jam2012Q_C_S();
        t.Handle();
    }
}
