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.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;


public class codejamp3 {
	public static char[] map;
	public static void main(String[] args) throws IOException{
		readFile();
	}

	public static String getResult(String input){
		int resultInt = 0;
		Set<Integer> exist = new HashSet<Integer>();
		String[] splitResult = input.split(" ");
		int numberA = Integer.parseInt(splitResult[0]);
		int numberB = Integer.parseInt(splitResult[1]);
		for(int i = numberA; i < numberB; i++){
			int current = i;
			exist.clear();
			int length1 = String.valueOf(current).length();
			int j = 10;
			while(j<=current){
				int remain = current%j;
				int length2 = String.valueOf(j).length(); 
				double b = Math.pow(10, length2-1);
				double a = Math.pow(10,length1);
				int currentResult = (int)(remain*a/b+current/j);
				if(current == 2022){
					System.out.println(remain+":"+(length2-1)+":"+currentResult);
				}
				if(currentResult <= numberB && currentResult > current){
					if(!exist.contains(currentResult)){
						exist.add(currentResult);
						resultInt++;
					}
				}
				j = j*10;
			}
		}
		return ""+resultInt;
	}
	public static void readFile() throws IOException{
			FileWriter fstream = new FileWriter("out.txt");
			BufferedWriter out = new BufferedWriter(fstream);
            FileReader input = new FileReader("in.txt");
            BufferedReader bufRead = new BufferedReader(input);	
            String line = bufRead.readLine();
            String current = getResult(line);
            int i = 1;
            out.write("Case #" + i + ": " + current);
            line = bufRead.readLine();
            while (line != null){
            	i++;
          	  	out.write('\n' + "Case #" + i + ": " + getResult(line));
          	  	line = bufRead.readLine();
            }             
            bufRead.close();
            out.close();
	}
}
