package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;


public class recycling {
	public static void main (String args[]){
		if (args.length != 1){
			System.out.println ("Gimme the right arguments!");
			return;
		}
		File f = new File(args[0]);
		int testcases, A, B;
		ArrayList <Integer> values = new ArrayList <Integer>();
		
	
		

		try{
			BufferedReader in = new BufferedReader (new FileReader(f));
			String s;
			testcases = Integer.parseInt(in.readLine());
			for (int i = 1; i<=testcases; i++){
				String temp [] = in.readLine().split(" ");
				A = Integer.parseInt(temp[0]);
				B = Integer.parseInt(temp[1]);
				int count = 0;
				for (int j=A; j<=B; j++){
					ArrayList <Integer> v = new ArrayList <Integer> ();
					v.add(j);
					String number = Integer.toString(j);
					int val;
					for (int k=0; k<number.length(); k++){
						number = shuffle(number);
						val = Integer.parseInt(number);
						if (j <= val && val <= B && !(v.contains(val))){
							count++;
							v.add(val);
						}
					}
					
					
					
				}
				
				System.out.printf ("Case #%d: %d\n", i, count );
				
				
			


			}
		}
			//while ((s = in.readLine()) != null){

			//}

		
		catch (IOException e){

		}
	}
	
	public static String shuffle (String s){
		String shuffled = "";
		for (int i = 1; i<s.length(); i++){
			shuffled += s.charAt(i); 
		}
		shuffled += s.charAt(0);
		return shuffled;
	}

}
