
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 problem3
{
    private final Scanner sc;
    private static final boolean debug = true;

    static void debug(Object ... objects)
    {
        if(debug)
            System.err.println(Arrays.toString(objects));        
    }

    problem3()
    {
        sc = new Scanner(new BufferedInputStream(System.in));
    }

    public static void main(String [] args)
    {
        (new problem3()).solve();
    }

    int AA,BB;

    int rot(int b)
    {
        int p=10;
        int cnt=0;
        int maxP = 1;
        int ans = 0;
        while(b/maxP > 0) maxP*=10;
        while(b/p>0)
        {
            int c = b/p + (maxP/p)*(b%p);
            //System.out.println(b+ " " + maxP+" " + c);
            if(c==b) break;
            if(c>b&&c<=BB&&c>=AA) ans++;
            p*=10;
        }
        return ans;
    }
    
    
    void solve()
    {
        int T = sc.nextInt();
        int cs = 0;
        while(cs < T)
        {
            cs++;
            long ans = 0;
            int A = sc.nextInt(), B = sc.nextInt();
            AA=A;BB=B;

            for(int i=A;i<=B;i++)
            {
                ans+=rot(i);
            }

            System.out.println("Case #" + cs+ ": "+ans);
        }

    }
}
