
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.ArrayList;
import java.util.Scanner;


public class Prob3 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);
		
		int num = scan.nextInt();
		scan.nextLine();
		for(int i=0;i<num;i++){
			System.out.println("Case #" + (i+1) + ": " + eval(scan));
			scan.nextLine();
		}
	}
	
	private static int eval(Scanner scan){
		int A = scan.nextInt();
		int B = scan.nextInt();
		int sum = 0;
		
		for(int i=A;i<=B;i++){
			sum += pairsFor(i, A, B);
		}
		
		return sum;
	}
	
	private static int pairsFor(int n, int A, int B){
		int res = 0;
		int length = ("" + n).length() - 1;
		int mod;
		int m = n;
		//System.out.println("n: " + m);
		
		ArrayList<Integer> d = new ArrayList<Integer>(length);
		
		for(int i=0;i<length;i++){
			mod = m%10;
			m = (int)Math.floor(m/10.0) + mod*(int)Math.pow(10, length);
		
			//System.out.println("o: " + m);
			if(m > n && m <= B && m >= A && mod != 0 && !d.contains(m)){
				//System.out.println("n: " + n + " m: " + m);
				d.add(m);
				res++;
			}
		}
		
		return res;
	}

}
