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.util.Scanner;
import java.util.Vector;


public class ThreadDispatcher{
	
	private static final int CORES = 8;
	private Vector<SolveThread> threads = new Vector<SolveThread>(CORES);
	Scanner scan = new Scanner(System.in);
	private int curCase = 0, T = 0;
	
	public ThreadDispatcher(){
		System.out.println("Paste input for qualification round - problem C");
		T = Integer.parseInt(scan.nextLine());
		for(int i = 1; i <= CORES; i++){
			if(i <= T){
				String line = scan.nextLine();
				curCase++;
				String[] limitsStr = line.split("\\s"); 
				int A = Integer.parseInt(limitsStr[0]);
				int B = Integer.parseInt(limitsStr[1]);
				SolveThread st = new SolveThread(A, B, curCase,this);
				threads.add(st);
				st.run();
			}
		}
	}
	
	public void finish(SolveThread thread){
		System.out.println("Case #" + thread.casenb + ": " + thread.pairs);
		threads.remove(thread);
		if(curCase < T){
			String line = scan.nextLine();
			curCase++;
			String[] limitsStr = line.split("\\s"); 
			int A = Integer.parseInt(limitsStr[0]);
			int B = Integer.parseInt(limitsStr[1]);
			SolveThread st = new SolveThread(A, B, curCase,this);
			threads.add(st);
			st.run();
		}
	}
	
	public static void main(String[] args){
		ThreadDispatcher td = new ThreadDispatcher();
	}
}
