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.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Scanner;
import java.util.Set;

import com.google.common.collect.Sets;

public class C {

	public static void main(String [] args) throws IOException {
		String inputFile = "src/C-large.in";
		Scanner in = new Scanner(new File(inputFile));
		PrintStream out = new PrintStream(inputFile.substring(0, inputFile.length()-2)+"out");
		int cases = in.nextInt();
		for (int c = 1; c <= cases; c++) {
			int a = in.nextInt();
			int b = in.nextInt();
			int count = 0;
			for (int i = a; i < b; i++) {
				String is = String.valueOf(i);
				Set<Integer> matches = Sets.newHashSet();
				for (int j = 1; j < is.length(); j++) {
					is = is.substring(1) + is.charAt(0);
					int t = Integer.parseInt(is);
					if (t > i && t <= b && !matches.contains(t)) {
						count++;
						matches.add(t);
					}
				}
			}
			out.print("Case #"+c+": " + count);
			out.println();
		}
		out.close();
	}
}
