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.HashMap;
import java.util.Scanner;


public class RecycledNumbers {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);

		int T = in.nextInt();
		
		for (int i = 1; i <= T; i++) {
			int A = in.nextInt();
			int B = in.nextInt();
			
			int numberOfRecycledPairs = findNumberOfRecycledPairs(A, B);
			System.out.format("Case #%d: %d\n", i, numberOfRecycledPairs);
		}
	}
	
	private static int findNumberOfRecycledPairs(int start, int end)
	{
		HashMap<String, String> recycledPairs = new HashMap<String, String>();
		for(int i = start; i <= end; i++)
		{
			int originalNumber = i;
			String numberStr = originalNumber + "";
			int numberLength = numberStr.length();
			for(int j = 1; j < numberLength; j++)
			{
				String newNumberStr = numberStr.substring(numberLength - j) + numberStr.substring(0, numberLength - j);
				int newNumber = Integer.parseInt(newNumberStr);
				if(newNumber >= start && newNumber <= end && newNumber > originalNumber)
					recycledPairs.put(originalNumber + "::" + newNumber,"");
			}
		}
		return recycledPairs.size();
	}

}
