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.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;

public class Solution {
	Solution() throws Exception {
	}

	String solve() throws Exception {
		int min = in.nextInt();
		int max = in.nextInt();

		return "" + permutations(min, max);
	}

	private int permutations(int min, int max) {
		int digits = Integer.toString(min).length();
		int permutations = 0;
		for (int i = min; i <= max; i++) {
			HashSet<Integer> found = new HashSet<>();
			for (int j = 1; j < digits; j ++) {
				int permutation = permute(i, j, digits);
				if (permutation > i && permutation <= max && permutation >= min) {
					found.add(permutation);
				}
			}
			permutations += found.size();
		}
		return permutations;
	}

	private int permute(int number, int permutation, int digits) {
		int m = (int) Math.pow(10, permutation);
		int back = number % m;
		int front = number / m;
		int m2 = (int) Math.pow(10, digits - permutation);
		return back * m2 + front;
	}

	void solveAll() throws Exception {
		int cases = in.nextInt();
		in.nextLine();
		for (int i = 1; i <= cases; i++) {
			String solution = "Case #" + i + ": " + solve();
			System.out.println(solution);
			out.println(solution);
		}
		out.flush();
	}

	// -----------------------------------------------------------------------

	static Scanner in = new Scanner(System.in);
	static PrintWriter out = new PrintWriter(System.out);

	public static void main(String[] args) throws Exception {
		new Solution().solveAll();
	}
}
