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){}
	}
}
import java.io.*;
import java.util.*;
import java.awt.*;
import static java.lang.System.*;

public class C {
	public static void main (String [] args) throws IOException {new C().run();}
	public void run() throws IOException{
		Scanner file = new Scanner(new File("C-large.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("C.out")));
		
		int times = file.nextInt();
		for(int asdf = 0; asdf<times; asdf++){
			//System.out.println (asdf);
			int a = file.nextInt(), b = file.nextInt();
			HashSet<Point> set = new HashSet<Point>();
			for(int i = a; i<=b; i++){
				String s = ""+i;
				for(int j = 1; j<s.length(); j++){
					if( s.charAt(j) >= s.charAt(0) ){
						int x = Integer.parseInt(s.substring(j,s.length()) +s.substring(0,j));
						if( i<x && x<=b ){set.add(new Point(i,x));
						//System.out.println (i +" " + x);
						}
					}
				}
			}
			out.println("Case #"+(asdf+1)+": "+set.size());
		}
		out.close();
		System.exit(0);
	}
}