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.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

public class Recycle {

	public static void main(String[] args) throws IOException {
		long t0 = System.currentTimeMillis();
		BufferedReader in = new BufferedReader(new FileReader("in.txt"));
		PrintWriter out = new PrintWriter("out.txt");
		int t = Integer.parseInt(in.readLine());
		for (int i = 1; i <= t; i++) {
			String[] ss = in.readLine().split(" ");
			int from = Integer.parseInt(ss[0]);
			int to = Integer.parseInt(ss[1]);
			out.println("Case #" + i + ": " + compute(from, to));
			System.out.println("Case #" + i + ": " + compute(from, to));
		}
		out.close();
		System.out.println("time: " + (System.currentTimeMillis() - t0));
	}

	private static int[] maxNum = { 0, 9, 99, 999, 9999, 99999, 999999, 2000000 };
	private static int[] precomputed = { 0, 0, 36, 801, 12060, 161982, 2023578, 299997 };

	private static int compute(int from, int to) {
		int dFrom = from <= 9 ? 1 : from <= 99 ? 2 : from <= 999 ? 3 : from <= 9999 ? 4 : from <= 99999 ? 5 : from <= 999999 ? 6 : 7;
		int dTo = to <= 9 ? 1 : to <= 99 ? 2 : to <= 999 ? 3 : to <= 9999 ? 4 : to <= 99999 ? 5 : to <= 999999 ? 6 : 7;
		int count;
		if (dFrom == dTo) {
			count = compute(from, to, dFrom);
		} else {
			count = 0;
			count += compute(from, maxNum[dFrom], dFrom);
			for (int i = dFrom + 1; i < dTo; i++) {
				// count += compute(maxNum[i - 1] + 1, maxNum[i], i);
				count += precomputed[i];
			}
			count += compute(maxNum[dTo - 1] + 1, to, dTo);
		}
		return count;
	}

	private static int compute(int from, int to, int digits) {
		int count = 0;
		int f = 1;
		for (int d = 1; d < digits; d++) {
			f *= 10;
		}
		List<Integer> recycled = new ArrayList<Integer>();
		for (int n = from; n <= to; n++) {
			recycled.clear();
			int m = n;
			for (int d = 1; d < digits; d++) {
				int r = (m % 10);
				m = (r * f) + (m / 10);
				if (r > 0 && m < n && m >= from && m <= to) {
					if (recycled.contains(m)) {
						// System.out.println("(" + m + "," + n + ")");
					} else {
						recycled.add(m);
						count++;
					}
				}
			}
		}
		return count;
	}

}
