import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashSet;
import java.util.Set;

public class RecycledNumbers {
	private static final String fname = "C-large.in";

	public static void main(String[] args) throws Exception {
		new RecycledNumbers().run();
	}
	
	private void run() throws Exception {
		BufferedReader reader = new BufferedReader(new FileReader("./" + fname));
		BufferedWriter writer = new BufferedWriter(new FileWriter("./" + fname
				+ ".out"));
		int T = Integer.parseInt(reader.readLine().trim());
		for (int i = 1; i <= T; i++) {
			String[] line = reader.readLine().trim().split("[ ]");
			int lower = Integer.parseInt(line[0]);
			int upper = Integer.parseInt(line[1]);
			int retval =0;
			for (int j = lower ; j <= upper; j++) {
					Set<Integer> set = new HashSet<Integer>(2);
					int l = length10(j);
					int mult = l/10;
					for (int k = 10; k <= l; k = k*10) {
						int x = (j % k) * mult + (j / k);
						if (x >= lower && x <= upper && x != j && j < x  && !set.contains(x)) {
							set.add(x);
							retval++;
						}
						mult /=10;
					}
			}
			writer.write("Case #" + i + ": " + retval);
			if (i < T) writer.write("\n");
		}
		reader.close();
		writer.close();
	}

	private static int length10(int n) {
		int div = 1;
		while (n / div > 0) {
			div *= 10;
		}
		return div;
	}
}
