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.FileInputStream;
//import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

//import java.util.Scanner;

public class C {

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		BufferedReader read = new BufferedReader(new InputStreamReader(
				new FileInputStream("C:/Users/Ortiga/Downloads/C-large.in")));
		byte length = Byte.parseByte(read.readLine());

		BufferedWriter write = new BufferedWriter(new OutputStreamWriter(
				new FileOutputStream(
						"C:/Users/Ortiga/Downloads/outputCLarg.txt")));
		for (int i = 0; i < length; i++) {
			String[] line = read.readLine().split(" ");
			int a = Integer.parseInt(line[0]), b = Integer.parseInt(line[1]), pairs = 0;
			String rit = "Case #" + (i + 1) + ": ";
			for (int j = a; j <= b; j++) {
				String cur = j + "";
				for (int k = 1; k < line[0].length(); k++) {
					int a1 = Integer.parseInt(cur.substring(k)
							+ cur.substring(0, k));
					if (a1 > j && a1 <= b)
						pairs++;
				}
			}
			rit += pairs;
			write.write(rit);
			if (i < length - 1)
				write.newLine();
		}
		read.close();
		write.close();
	}
}