
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.HashSet;
import java.util.Scanner;

public class RecycledNumbers {
	
	public static int[] POWER_OF_10 = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000};
	
	public static int rotate(int n, int offset) {
		return (n % POWER_OF_10[offset]) * POWER_OF_10[(int) Math.log10(n) + 1 - offset] + (n / POWER_OF_10[offset]);
	}
	
	public static int count(int low, int high) {
		int count = 0;
		if (low < 10) {
			low = 10;
		}
		
		HashSet<Integer> group = new HashSet<Integer>();
		for (int i = low; i < high; i++) {
			int numDigit = (int) Math.log10(i) + 1;
			while (numDigit > 0) {
				int num = rotate(i, numDigit--);
				if (num > i && num <= high && !group.contains(num)) {
					count++;
					group.add(num);
				}
			}
			group.clear();
		}
		
		return count;
	}
	
	public static void main(String[] args) {
		final Scanner in = new Scanner(System.in);
		final int numCase = in.nextInt();
		in.nextLine();
		for (int i = 0; i < numCase; i++) {
			int low = in.nextInt();
			int high = in.nextInt();
			System.out.println("Case #" + (i+1) + ": " + count(low, high));
			in.nextLine();
		}
	}
}
