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.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;

public class Main3 {

	public static final String fileName = "A-small-attempt0.in";
	public static int[] power = new int[] { 1, 10, 100, 1000, 10000, 100000,
			1000000, 10000000, 100000000, 1000000000 };

	/**
	 * @param args
	 * @throws FileNotFoundException
	 */
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(fileName));
		PrintWriter pw = new PrintWriter(new File("out.txt"));
		int num = Integer.valueOf(br.readLine());
		for (int i = 0; i < num; i++) {
			String inline = br.readLine();
			int result = 0;
			String[] tmp = inline.split(" ");
			int a = Integer.valueOf(tmp[0]);
			int b = Integer.valueOf(tmp[1]);
			int size = 0;
			int a2 = a;

			while (a2 > 0) {
				a2 /= 10;
				size++;
			}

			for (int j = a; j < b; j++) {
				int prev = -1;
				for (int k = 1; k < size; k++) {
					int swapNum = swap(j, k, size);

					if (j < swapNum && swapNum <= b && swapNum != prev) {
						prev = swapNum;
						result++;
					}
				}
			}

			pw.println("Case #" + (i + 1) + ": " + result);
		}
		pw.close();
	}

	private static int swap(int raw, int posNum, int size) {
		return (raw % power[posNum]) * power[size - posNum] + raw
				/ power[posNum];
	}

}
