import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
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-small-attempt0.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("C.out")));
		
		int times = file.nextInt();
		for(int asdf = 0; asdf<times; 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);
	}
}