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.util.Scanner;
import java.io.*;
import java.util.HashSet;
import java.util.LinkedList;


public final class problem2 {

	public static HashSet <String> hash;
	
	public static String decode(int min, int max){
		int total = 0;
		hash = new HashSet <String>();
		
		try{
			//FileWriter fw = new FileWriter("final1.txt");
			
			for(int i = min ; i <= max ; i++){
				String n = Integer.toString(i);
				int len = n.length();
				n = n.concat(n);
				
				int count = 0;
				for(int j = 0 ; j <= len ; j++){
					String tmp = n.substring(j, j+len);
					
					if(tmp.charAt(0) != '0'){
						int m = Integer.valueOf(tmp);
						
						if(m >= min && m <= max){
							if(!hash.contains(tmp)){
								hash.add(tmp);
								count++;
								//fw.write(tmp + "\n");
							}
						}
					}
				
				}
				
				if(count > 1)
					count = count * (count - 1) / 2;
				else
					count = 0;
				
				total += count;
			
			}
			//fw.write(total);
			//fw.close();
			
			
		}catch(Exception e){}
		
		return Integer.toString(total);
		
	}


	
	public static void main(String[] args){

		try{
			//Scanner sc = new Scanner(new File("yo.txt"));
			Scanner sc = new Scanner(new File("C-large.in"));
			FileWriter fw = new FileWriter("Large.txt");
		
		
			String tmp = sc.nextLine();
			int step = Integer.valueOf(tmp);
		
			int counter = 1;
			while(sc.hasNextLine()){
				//System.out.print("Case #" + counter + ": "); 
				
				String s = sc.nextLine();
				Scanner ssc = new Scanner(s);
				int A = ssc.nextInt();
				int B = ssc.nextInt();
				
				
				//System.out.println(A + " " + B); 
				String xx = decode(A, B);
				System.out.println("Case #" + counter + ": " + xx);
				fw.write("Case #" + counter + ": " + xx);
				fw.write("\n");
				counter++;
				if(step < counter)
					break;
			}
			fw.close();
		}catch(Exception e){}
		
	}
	
}