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.ArrayList;
import java.util.List;


public class RecycledNumbers {

	private int A;
	private int B;
	
	public RecycledNumbers(int A, int B) {
		this.A = A;
		this.B = B;
	}
	
	public int calculate() {
		int result = 0;
		int digitCount = Integer.toString(A).length();
		
		if (digitCount == 1) return 0;
		
		List<String> numbers = new ArrayList<String>();
		for (int i = A; i < B + 1; i++) {
			numbers.add(Integer.toString(i));
		}
		
		for (int i = 0; i < numbers.size(); i++) {
			String number = numbers.get(i);
			
			for (int j = 1; j < digitCount; j++) {
				String reverseNumber = number.substring(j) + number.substring(0, j);
				int reversInt = Integer.parseInt(reverseNumber);
				
				if ((reversInt <= B) && (reversInt > Integer.parseInt(number))) {
//					System.out.println("A(" + A + ") <= " + number + " < " + reverseNumber + " <=B(" + B + ")");
					result++;
				}
			}
		}
		
		return result;
	}
	
	public static List<RecycledNumbers> parseFromFile(List<String> readInput) {
		List<RecycledNumbers> result = new ArrayList<RecycledNumbers>();
		int testCaseCount = Integer.parseInt(readInput.get(0));

		for (int i = 0; i < testCaseCount; i++) {
			String line[] = readInput.get(i + 1).split(" ");

			result.add(new RecycledNumbers(Integer.parseInt(line[0]), Integer.parseInt(line[1])));
		}

		return result;
	}
	
	@Override
	public String toString() {
		return "A = " + A + "; B = " + B;
	}
}
