import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Scanner;
import java.util.TreeSet;

// Recycled Numbers
// https://code.google.com/codejam/contest/1460488/dashboard#s=p2

public class C {

	private static String process(Scanner in) {
		int A = in.nextInt();
		int B = in.nextInt();
		int res = 0;
		int len = Integer.toString(A).length();
		for(int n = A; n < B; n++) {
			String str = Integer.toString(n);
			TreeSet<Integer> set = new TreeSet<Integer>();
			for(int i = 1; i < len; i++) {
				int m = Integer.parseInt(str.substring(i, len) + str.substring(0, i));
				if ( m > n && m <= B && ! set.contains(m) ) {
					set.add(m);
					res++;
				}
			}
		}
		return Integer.toString(res);
	}

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in.available() > 0 ? System.in : 
			new FileInputStream(Thread.currentThread().getStackTrace()[1].getClassName() + ".practice.in"));
		int T = in.nextInt();
		for(int i = 1; i <= T; i++) 
			System.out.format("Case #%d: %s\n", i, process(in));
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;


public class App {
	public static void main (String[] args){
		
		try{
			FileInputStream fstream = new FileInputStream("input.in");
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
		
			int cases = Integer.parseInt(br.readLine());
			String output = "";
			
			for(int i=1;i<=cases;i++){
				String line = br.readLine();
				String[] arr = line.split(" ");
				
				int a = Integer.parseInt(arr[0]);
				int b = Integer.parseInt(arr[1]);
				
				int count = RecyclePair.Calculate(a, b);
				
				output += "Case #"+i+": "+count;
				
				if(i+1 <= cases){
					output += "\n";
				}
			}
			
			in.close();
			System.out.println(output);
			
			FileWriter fwstream = new FileWriter("output.out");
			BufferedWriter out = new BufferedWriter(fwstream);
			out.write(output);
			out.close();
		}
		catch (Exception e) {
			
		}
		
	}
}
