
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.Scanner;


public class Main {
	public static void main(String [] args) {
		Scanner in = new Scanner(System.in);
		int T = in.nextInt();
		for(int x=0; x<T; x++) {
			int A = in.nextInt();
			int B = in.nextInt();
			int pow = (int) Math.floor(Math.log10(A));
			//System.out.println("Pow=" + String.valueOf(pow));
			int tomult = (int) Math.pow(10, pow);
			int compteur = 0;
			for(int n=A; n<=B; n++) {
				int m = n;
				for(int i=0; i<pow; i++) {
					m = (m%10)*tomult + m/10;
					//System.out.println("m="+ String.valueOf(m));
					if(m>n && m<= B) {
						compteur++;
						//System.out.println("("+String.valueOf(n)+","+String.valueOf(m)+")");
					}
				}
			}
			System.out.print("Case #" + String.valueOf(x+1) + ": ");
			System.out.println(compteur);
		}
	}
}