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.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class ProblemC {

	public static void main(String[] args) throws FileNotFoundException {

		String test = "4\n" + "1 9\n" + "10 40\n" + "100 500\n" + "1111 2222\n";

		Scanner sc = new Scanner(new File("C-small-attempt0.in"));
		int teller = 0;
		int numLines = 0;
		String finalOut = "";
		boolean print = false;

		int n = 0;// smal number
		int m = 0;// big number
		int A = 0; // min number
		int B = 0; // max number

		int S = 0; // answare
		String[] split;

		while (true) {
			String line = sc.nextLine();
			if (teller == 0) {
				numLines = Integer.valueOf(line);
			} else {
				print = true;
				split = line.split(" ");
				A = Integer.valueOf(split[0]);
				B = Integer.valueOf(split[1]);

				for (n = A; n < B; n++) {
					for (m = n + 1; m <= B; m++) {
						S += check(n, m);
					}
				}

			}

			if (print) {

				if (teller == numLines) {
					System.out.println("Case #" + teller + ": " + S);
					finalOut += "Case #" + teller + ": " + S;
					break;
				} else {
					System.out.println("Case #" + teller + ": " + S);
					finalOut += "Case #" + teller + ": " + S + "\n";
				}
				S = 0;

			}
			teller++;
		}

		PrintWriter writer = new PrintWriter(new File("out.txt"));

		writer.print(finalOut);
		writer.close();

	}

	private static int check(int n, int m) {

		String N = "" + n;
		String M = "" + m;
		if (M.length() == 1) {
			return 0;
		}

		for (int i = 1; i < N.length(); i++) {

			String temp = N.substring(N.length() - (i), N.length());
			temp += N.substring(0, N.length() - (i));


			if (temp.equals(M)) {
				return 1;
			}
		}
		return 0;
	}

}
