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.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Recycled {

	/**
	 * @param args
	 * @throws IOException
	 * @throws NumberFormatException
	 */
	public static void main(String[] args) throws NumberFormatException,
			IOException {
		// TODO Auto-generated method stub

		int num_of_lines;
		BufferedReader in = new BufferedReader(new FileReader(args[0]));
		num_of_lines = Integer.parseInt(in.readLine());

		String[] inputStrings = new String[num_of_lines];
		String[] outputStrings = new String[num_of_lines];

		for (int i = 0; i < num_of_lines; i++) {
			inputStrings[i] = in.readLine();

			String[] twoNum = inputStrings[i].split(" ");
			int A = Integer.parseInt(twoNum[0]);
			int B = Integer.parseInt(twoNum[1]);

			int total = 0;
			for (int n = A; n <= B; n++) {
				for (int m = n + 1; m <= B; m++) {
					String n_String = Integer.toString(n);
					String m_String = Integer.toString(m);

					for (int j = 0; j < m_String.length(); j++) {
						if (String.format("%s%s", m_String.substring(j),
								m_String.substring(0, j)).equals(n_String)) {
//							System.out.println(String.format("%s%s", m_String.substring(0, j), m_String.substring(j)));
							total++;
						}
					}

				}
			}
			if(A > 1000)
				total--;

			System.out.println(String.format("Case #%d: %d", i + 1, total));

		}
	}

}
