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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Scanner;


public class RecylcedNumbers {

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(new File("input.in"));
		BufferedWriter bfrw = new BufferedWriter(new FileWriter("output.out"));
		
		long N = in.nextLong();
		String output = "";
		for(long i = 0; i < N;i++){
			long A = in.nextLong();
			long B = in.nextLong();
			
			output += "Case #"+(i+1)+": " + solve(A,B) + "\n";
		}
		
		bfrw.write(output);
		in.close();
		bfrw.close();
	}
	
	private static long solve(long A,long B){
		long ans = 0;
		if(B <= 9) return 0;
		HashSet<String> set = new HashSet<String>();
		for(long i = A; i <=B; i++){
			String s = i+"";
			
			for(int j = 0; j < s.length();j++){
				String one = s.substring(s.length()-j);
				String two = s.substring(0,s.length()-j);
	
				if(Integer.parseInt(one+two) <= B && i < Integer.parseInt(one+two)) {
					ans++;
					//System.out.println(s + " --> " + one + two);
					set.add(i+","+Integer.parseInt(one+two));
				}
			}
		}
		
		return set.size();
	}
}
