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.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;


public class Main {
	
	public static void main(String args[]) throws NumberFormatException, IOException {
		
		BufferedReader in = new BufferedReader(new FileReader("C-large.in"));
		PrintWriter out = new PrintWriter(new FileWriter("out.txt")); 
		RecycledNumbers prog = new RecycledNumbers();
		
		String inString = "";
		int t = Integer.parseInt(in.readLine());
		
		for(int i = 0; i < t; i++) {
			
			inString = in.readLine();
			String[] word = inString.split(" ");
			int a = Integer.parseInt(word[0]);
			int b = Integer.parseInt(word[1]);
			out.println("Case #" + (i+1) + ": " + prog.getNumbers(a, b));
			
		}
		in.close();
		out.close();
		
	}
	
	private static void printArray(String[] a) {
		
		for(int i = 0; i < a.length; i++) {
			
			System.out.print(a[i] + " ");
			
		}
		System.out.print("\n");
		
	}

}
