import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.util.HashMap;
import java.util.Scanner;


public class recyclednumbers {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int numOfLines = Integer.parseInt(in.nextLine());
		for(int i = 0;i<numOfLines;i++)
		{
			String resultline = "Case #"+(i+1)+": "+readLine(in.nextLine());
			System.out.println(resultline);
		}
	}
	
	public static int checkNumber(int min,int max, int number)
	{
		String numberString = String.valueOf(number);
		HashMap<Integer,Integer> map = new HashMap<Integer, Integer>();
		int length = numberString.length();
		for(int i =1;i<length;i++)
		{
			int recycled = Integer.parseInt(numberString.substring(i,length)+numberString.substring(0,i));
			if(recycled > number&&recycled<=max)
			{
				map.put(recycled, 0);
			}
		}
		return map.size();
	}
	
	public static int checkRange(int start,int end)
	{
		int count = 0;
		for(int i = start;i<end;i++)
		{
			count += checkNumber(start, end, i);
		}
		return count;
	}
	
	public static String readLine(String line)
	{
		String[] pair = line.split(" ");
		int result = checkRange(Integer.parseInt(pair[0]),Integer.parseInt(pair[1]));
		return String.valueOf(result);
	}

}
