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.File;
import java.io.FileNotFoundException;
import java.util.Scanner;


public class RecycledNumber {
	public static void main (String[] args) throws FileNotFoundException{

		Scanner scan = new Scanner (new File ("input.txt"));
		int caseNumber = scan.nextInt();
		scan.nextLine();
		
		for(int k=0; k<caseNumber; k++){
			int result = 0;
			int A = scan.nextInt();
			int B = scan.nextInt();
			
			for (int i = A ; i <= B ; i++){
				for (int j = 1; j < numberOfDigits(i) ; j++){
					if (digit(i,j)>=digit(i,numberOfDigits(i))){
						if (A <= recycle(i,j) && B >= recycle(i,j) && i<recycle(i,j)){
							result++;
						}
					}

				}
			}
			System.out.println("Case #"+(k+1)+": "+result);
			if (scan.hasNextLine()){
				scan.nextLine();
			}
		}

	}
	
	static int numberOfDigits(int number){
		return ((int)Math.floor(Math.log10(number))) + 1;
	}
	
	static int recycle(int number, int digit){
		int newPrefix =  (((int)(number%Math.pow(10, digit)))*(int)Math.pow(10, (numberOfDigits(number)-digit)));
		int newSuffix = number/(int)(Math.pow(10, digit)) ;
		return newPrefix+newSuffix;
	}
	
	static int digit(int number, int digit){
		return (number/(int)(Math.pow(10,digit-1)))%10;
	}
}
