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;
	}

}

package recycledNumbers;

import java.util.ArrayList;



public class MainClass 
{
	public static void main(String[] z)throws Exception
	{
		String string ="";
		ArrayList<String> list = new InputFile().readFile();
		int caseNumber =1;
		ArrayList<String> output = new ArrayList<String>();
		for(int i=0 ;i<list.size();i++)
		{
			
			String[] array = list.get(i).split(" ");
			//String[] array = "1 9".split(" ");
			int x = Integer.parseInt(array[0]);
			int y = Integer.parseInt(array[1]);
			string = 	"Case #" + caseNumber + ": " + new RecycledNumbers().countRecylcedNumbers(x, y);
			output.add(string);
			System.out.println(string );
			caseNumber++;
		}
		new OutputFile().writeFile(output);
	}
}