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.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Main {

	public static void main(String[] args) throws Exception{
		File inFile=new File("C-small-attempt1.in");
		File outFile=new File(inFile.getName().substring(0,inFile.getName().length()-3)+".out");
		BufferedReader in=new BufferedReader(new FileReader(inFile));
		//BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
		int cases=Integer.parseInt(in.readLine());
		Recycler r[]=new Recycler[cases];
		ExecutorService executor=Executors.newFixedThreadPool(10);
		for(int i=0;i<cases;i++){
			String temp[]=in.readLine().split(" ");
			int first=Integer.parseInt(temp[0]);
			int second=Integer.parseInt(temp[1]);
			r[i]=new Recycler(first,second);
			executor.execute(r[i]);
		}
		executor.shutdown();
		while(!executor.isTerminated());
		DataOutputStream out=new DataOutputStream(new FileOutputStream(outFile));
		for(int i=0;i<cases;i++){
			out.writeBytes("Case #"+(i+1)+": "+r[i].getCount()+"\n");
			System.out.println("Case #"+(i+1)+": "+r[i].getCount());
		}
	}
}
