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.IOException;
import java.io.InputStreamReader;
import java.util.LinkedList;
import java.util.Scanner;

public class leadingZero {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		BufferedReader read = new BufferedReader(new InputStreamReader(
				System.in));
		String ll;
		ll = read.readLine();
		int a = Integer.parseInt(ll);
		for (int k = 0; k < a; k++) {
			Scanner scn=new Scanner(read.readLine());
			int A = scn.nextInt();
			int B = scn.nextInt();
			
			int[] s = new int[20000000];
			for (int i = A; i <= B; i++) {
				String r = i + "";
				int l = i;
				LinkedList<Integer>list=new LinkedList<Integer>();
				
				for (int j = 0; j < r.length() - 1; j++) {
					int b = l % 10;
					l = l / 10 + (int) Math.pow(10, r.length() - 1) * b;
					if (l > i && !list.contains(l))
					{
						s[l]++;
						list.add(l);
					}
				}
			}
			int sum = 0;
			for (int i = A; i <= B; i++) {
				if (s[i] > 0) {
					sum += s[i];
					//System.out.println(i+"  ..  "+s[i]);
				}
			}
			System.out.println("Case #"+(k+1)+": "+sum);
		}
	}

}
