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.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;


public class C {

	public final String INPUT_FILE_NAME = "c_in";
	public final String OUTPUT_FILE_NAME = "c_out";
	
	int kase = 1;
	int T = 0;
	int a,b;
	public void run() throws IOException{
		Scanner s = new Scanner(new File(INPUT_FILE_NAME));
		PrintWriter pw = new PrintWriter(new FileWriter(OUTPUT_FILE_NAME));
		//PrintWriter pw = new PrintWriter(new OutputStreamWriter(System.out));
		
		T = s.nextInt();
		while (T-- > 0){
			a = s.nextInt();
			b = s.nextInt();
			int len = ("" + a).length();
			
			int ans = 0;
			for (int i = a; i <=b ; i++) {
				String s1 = i + "";
				String temp = "";
				for (int k = 1; k < s1.length() ; k++) {
					temp = s1.substring(s1.length() - k) + s1.substring(0,s1.length()-k);
					int r1 = Integer.parseInt(temp); 
					if (r1 > i && r1 <= b)
						ans++;
				}
			}
			
			pw.println("Case #" + kase + ": " + ans);
			kase++;
		}
		
		pw.close();
		s.close();
	}
	
	
	public static void main(String[] args) throws IOException {
		(new C()).run();
	}

}
