
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.io.*;
/**
 *
 * @author ankush
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)throws IOException {
        //System.out.println(Math.floor(Math.log10(11)));
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        int t=Integer.parseInt(br.readLine());
        int ans[]=new int[t];
        for(int i=0;i<t;i++)
        {
            String x=br.readLine();
            String r[]=new String[2];
            r=x.split(" ");
            int a=Integer.parseInt(r[0]);
            int b=Integer.parseInt(r[1]);
            int count=0;
            for(int j=a;j<=b;j++)
            {
                int p=j/10;
                int m=j%10;
                int q=(int)(Math.floor(Math.log10(j)))+1;
                for(int k=1;k<q;k++)
                {
                     int s=m*(int)(Math.pow(10.0,(q-1)*1.0))+p;
                     int n=(int)(Math.floor(Math.log10(s)))+1;
                    if(s>j && s<=b && n==q)
                    {
                        count++;
                     // System.out.println(j+" "+s+" "+count+" "+p+" "+q+" "+m);
                     }
                    m=s%10;
                    p=s/10;

                }
            }
            ans[i]=count;
        }
        for(int i=0;i<t;i++)
        {
            System.out.println("Case #"+(i+1)+": "+ans[i]);
        }
    }
}