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.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintStream;


public class RecycledNumbers {


	public static String SMALL_IN_FILE_NAME = "./input.txt";
	static PrintStream out = null;
	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		File smallIn = new File(SMALL_IN_FILE_NAME);
		BufferedReader br = new BufferedReader(new FileReader(smallIn));
		String s = br.readLine();
		int caseCount = Integer.parseInt(s);
		File smallOut = new File("./output.txt");
		smallOut.createNewFile();
		out = new PrintStream(smallOut);
//		out = System.out;

		for (int i = 0; i < caseCount; i ++) {
			out.printf("Case #%d: ", i+1);
			s = br.readLine();
			TestCase t = new TestCase(s);
			out.println(t.solve());
		}
	}

}
