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.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	private static int T = 0;
	public static BufferedReader bufReader;
	public static BufferedWriter bufWriter;
	public static File wFile, rFile;

	private static int tMinLimit = 1;
	private static int tMaxLimit = 2000000;
	private static String rFilename = "C-large.in";
	private static String wFilename = "OUTPUT0.txt";

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		rFile = new File(rFilename);
		bufReader = new BufferedReader(new InputStreamReader(
				new FileInputStream(rFile), "utf8"));

		wFile = new File(wFilename);// «Ø¥ßÀÉ®×¡A·Ç³Æ¼gÀÉ
		bufWriter = new BufferedWriter(new OutputStreamWriter(
				new FileOutputStream(wFile, false), "utf8"));

		T = Integer.valueOf(bufReader.readLine().trim());
		if (tMinLimit <= T && T <= tMaxLimit) {
			for (int i = 1; i <= T; i++) {
				String[] AB = bufReader.readLine().split(" ");
				new Round1C(i, Integer.parseInt(AB[0]), Integer.parseInt(AB[1]));
			}
		}
		bufWriter.close();
	}

}