import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

package codejam;

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

public class Qual2012C {
	private static int digitCount;
	private static int[] MULTIPLES = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 };

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int nrOfTestCases = scanner.nextInt();
		for (int caseNr = 1; caseNr <= nrOfTestCases; caseNr++) {
			int a = scanner.nextInt();
			int b = scanner.nextInt();
			digitCount = digitCount(a);
			System.out.println("Case #" + caseNr + ": " + solve(a, b));
		}
	}

	private static int digitCount(int a) {
		if (a == 0)
			return 0;
		return 1 + digitCount(a / 10);
	}

	private static long solve(int min, int max) {
		long total = 0;
		for (int n = min; n < max; n++)
			total += pairsFor(n, max);
		return total;
	}

	private static int pairsFor(int n, int max) {
		if (n >= max)
			return 0;
		HashSet<Integer> set = new HashSet<Integer>();
		for (int i = 1; i < digitCount; i++) {
			int multipleSplit = MULTIPLES[i];
			int tail = n % multipleSplit;
			if (tail < MULTIPLES[i - 1])
				continue;
			int m = tail * MULTIPLES[digitCount - i] + (n / multipleSplit);
			if (n < m && m <= max)
				set.add(m);
		}
		return set.size();
	}
}
