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.*;
import java.util.*;

public class recycled {

	private static int digits(int num) {
		
		int sol = 1;

		while (num / 10 != 0) {
			sol *= 10;
			num /= 10;
		}

		return sol;
	}

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {

		Scanner fe = new Scanner(new FileInputStream("/home/gllera/Desktop/data.in"));
		FileWriter fs = new FileWriter("/home/gllera/Desktop/data.out");

		int cases = fe.nextInt();

		for (int i = 0; i < cases; i++) {
			int a = fe.nextInt();
			int b = fe.nextInt();

			int sol = 0;

			TreeSet<Integer> tree = new TreeSet<Integer>();
			
			for (int n = a; n < b; n++) {
				
				tree.clear();
				int digits = digits(n);
				int idigits = 10;
				int n1 = n / digits;
				int n2 = n % digits;
				
				while ( digits != 1 )
				{
					int m = n2 * idigits + n1;
					if ( n < m && m <= b && !tree.contains(m) )
					{
						tree.add(m);
						sol++;
					}
					
					digits /= 10;
					idigits *= 10;
					
					n1 = n / digits;
					n2 = n % digits;
				}
			}

			fs.write("Case #" + (i + 1) + ": " + sol + '\n');
		}

		fe.close();
		fs.flush();
		fs.close();
	}
}
