package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

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 = 50;
	private static String rFilename = "C-small-attempt0.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();
	}

}