
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;
import java.io.File;
import java.io.IOException;
import java.io.FileWriter;
import java.io.BufferedWriter;

public class Recycle
{
	public static void main(String[] args)
	{
/*		Set<Integer> perms = getPermutations(123456);
		
		for(Integer i: perms)
			System.out.println(i);*/
	
		try
		{
			Scanner s = new Scanner(new File("recycle.in"));
			BufferedWriter w = new BufferedWriter(new FileWriter(new File("recycle.out")));
			int numCases = s.nextInt();
			s.nextLine();
			
			for(int n = 1;n <= numCases; n++)
			{
				int A = s.nextInt();
				int B = s.nextInt();
				int count = 0;
				for(int k = A; k <= B; k++)
				{
					count += getNumPairs(k, B);
				}
				
				w.write("Case #" + n + ": " + count + "\n");
			}
			
			w.flush();
			w.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
	
	public static int getNumPairs(int n, int B)
	{
		Set<Integer> possibles = getPermutations(n);
		int count = 0;
		for(Integer i : possibles)
			if(i > n && i <= B)
				count++;
		return count;
	}
	
	public static Set<Integer> getPermutations(int n)
	{
		Set<Integer> perms = new TreeSet<Integer>();
		char[] digits = String.valueOf(n).toCharArray();
		
		for(int firstPos = 1; firstPos < digits.length; firstPos++)
		{
			String toBuild = "";
			for(int k = 0; k < digits.length; k++)
				toBuild += digits[(firstPos + k) % digits.length];
			perms.add(Integer.parseInt(toBuild));
		}
		return perms;
	}
	

}
import java.util.*;
import java.io.*;

public class codejam1{

    public static void main(String [] args){
        HashMap<Integer, Integer> permuToPairs = new HashMap<Integer, Integer>();
        permuToPairs.put(1,0);
        permuToPairs.put(2,1);
        permuToPairs.put(3,3);
        permuToPairs.put(4,6);
        permuToPairs.put(5,10);
        permuToPairs.put(6,15);
        permuToPairs.put(7,21);
        //System.out.println(findRecycle(1111, 2222,permuToPairs));
        int count = 1;
        try{
            Scanner sc = new Scanner(new File("C-small-attempt0.in"));
            PrintStream ps = new PrintStream(new File("OutputFile"));
            sc.nextLine();
            while (sc.hasNextLine()){
                String line  = sc.nextLine();
                String[] numbers = line.split(" ");
                long low = Long.parseLong(numbers[0]);
                long high = Long.parseLong(numbers[1]);
                
                String s = "Case #"+count+": " + findRecycle(low, high,permuToPairs);
                if(sc.hasNextLine()){
                    s +="\n";
                }
                ps.print(s);
                count ++;
            }
        }catch(Exception e){
            
        }
    }   
    
    public static long findRecycle(long low, long high, HashMap<Integer, Integer> permuToPairs){
        Set<Long> numberSet = new HashSet<Long>();
        String numberString = low+"";
        int numWidth = numberString.length();
        long count = 0;
        for(long i = low; i<= high; i++){
            if(!numberSet.contains(i)){
                numberSet.add(i);
                long permuNumber = i;
                int numPermus = 1;
                for(int j = 0; j < numWidth; j++){
                    // permute the number
                    permuNumber = permuNumber % 10* (int)Math.pow(10, numWidth-1)+permuNumber/10;
                    if(permuNumber >= low && permuNumber <= high && !numberSet.contains(permuNumber)){
                        numPermus++;
                        numberSet.add(permuNumber);
                    }
                }
                count += permuToPairs.get(numPermus);
            }
        }
        return count;
        
    }
}