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();
		}
	}
}

package qualification.q1;

import java.util.HashMap;
import java.util.Map;

/**
 * Created by IntelliJ IDEA.
 * User: ofer
 * Date: 14/04/12
 * Time: 17:10
 * To change this template use File | Settings | File Templates.
 */
public class Q1Solver {
    
    private Map<Character,Character> mapping;
    
    public Q1Solver(){
        mapping = new HashMap<Character, Character>();
        mapping.put('y','a');
        mapping.put('n','b');
        mapping.put('f','c');
        mapping.put('i','d');
        mapping.put('c','e');
        mapping.put('w','f');
        mapping.put('l','g');
        mapping.put('b','h');
        mapping.put('k','i');
        mapping.put('u','j');
        mapping.put('o','k');
        mapping.put('m','l');
        mapping.put('x','m');
        mapping.put('s','n');
        mapping.put('e','o');
        mapping.put('v','p');
        mapping.put('z','q');
        mapping.put('p','r');
        mapping.put('d','s');
        mapping.put('r','t');
        mapping.put('j','u');
        mapping.put('g','v');
        mapping.put('t','w');
        mapping.put('h','x');
        mapping.put('a','y');
        mapping.put('q','z');
        mapping.put(' ',' ');
        
    }
    
    public String convertString(String encrypted){
        StringBuilder resString = new StringBuilder("");
        for (int i = 0 ; i < encrypted.length() ; i++){
            char decryptedChar = mapping.get(encrypted.charAt(i));
            resString.append(decryptedChar);
        }
        return resString.toString();
    }
}
