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.util.*;
import java.io.*;

public class Solution {
	public void doMain() throws Exception {
		BufferedReader in = new BufferedReader(new FileReader("input.txt"));
		PrintWriter pw = new PrintWriter(new FileWriter("output.txt"));		
		int CaseNumber = Integer.parseInt(in.readLine());		
		for (int cas=1; cas <= CaseNumber; cas++) {
			int nbr = 0 ;			
			String[] str = in.readLine().split(" ");
			int A = Integer.parseInt(str[0]);
			int B = Integer.parseInt(str[1]);
			if(A < 10) {
				pw.println("Case #"+cas+": "+nbr);
			}
			else if(A==B){
				pw.println("Case #"+cas+": "+nbr);
			}
			else{
				ArrayList<String> n = new ArrayList<String>();
				for(int i=A; i<=B; i++){
					String st = Integer.toString(i);
					int l = st.length();
					for(int j=l-1; j>0 ; j--){
						String s = st;
						s = s.substring(j) + s;
						s = s.substring(0,l);
						
						if(Integer.parseInt(s) >A && Integer.parseInt(s) <B && Integer.parseInt(s)!=i && !n.contains(""+i+"-"+s) && !n.contains(s+"-"+i)){
							n.add(s+"-"+i);
							n.add(""+i+"-"+s);
							nbr++;
						}
					}	
				}
				pw.println("Case #"+cas+": "+nbr);
			}
		}
		
		in.close();
		pw.flush();
		pw.close();
	}
	
	public static void main(String[] args) throws Exception {
		(new Solution()).doMain();
	}
}