
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.*;
import java.math.*;
import java.awt.*;
import static java.lang.Math.*;
import static java.lang.Integer.parseInt;
import static java.lang.Double.parseDouble;
import static java.lang.Long.parseLong;
import static java.lang.System.*;
import static java.util.Arrays.*;
import static java.util.Collection.*;

public class C
{
    public static void main(String[] args) throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        int T = parseInt(br.readLine());
        for(int t = 0; t++ < T; )
        {
            String[] line = br.readLine().split(" ");
            int A = parseInt(line[0]), B = parseInt(line[1]);
            long[] V = new long[B - A + 1], S = new long[B - A + 1];
            int order = 1;
            S[0] = V[0] = 0;
            while(order < B) order *= 10;
            
            for(int i = A + 1; i <= B; i++)
            {
                int index = -1;
                for(int j = 10; j <= i; j *= 10)
                {
                    int count = i / j + (i % j) * (order / j);
                    if(index < count && count < i)
                        index = count;
                }
                V[i - A] = index >= A ? V[index - A] + 1 : 0;
                S[i - A] = V[i - A] + S[i - A - 1];
            }
            out.println("Case #" + t +": " + S[B-A]) ; 
        }
    }
}
