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.awt.Point;
import java.io.File;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class C {
	public static Set<Point> set;

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(new File("input.in"));
		int n, a, b;
		int ans;
		n = in.nextInt();

		for (int tc = 1; tc <= n; tc++) {
			a = in.nextInt();
			b = in.nextInt();
			set = new HashSet<Point>();
			ans = finder(a, b) / 2;
			System.out.println("Case #" + tc + ": " + set.size() / 2);
			// System.out.println();
		}

	}

	public static int finder(int a, int b) {
		int temp;
		int ans = 0;
		for (int i = a; i <= b; i++) {
			for (int j = 1;; j++) {
				temp = moveDigits(i, j);
				if (temp == -1)
					break;
				if (temp != i && temp >= a && temp <= b) {
					// System.out.println("Output :" + i + "  " + temp);
					set.add(new Point(i, temp));
					ans++;
				}
			}

		}
		return ans;
	}

	public static int moveDigits(int num, int moveBy) {
		String s = Integer.toString(num);
		int size = s.length();
		if (moveBy >= s.length())
			return -1;
		s = s.substring(moveBy) + s.substring(0, moveBy);
		if (Integer.toString((Integer.parseInt(s))).length() != size)
			return 0;
		return Integer.parseInt(s);
	}

}
