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();
		}
	}
}

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Scanner;

public class GCJ3 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] hold = new int[n];
		for (int i = 0; i < n; i++) {
			hold[i] = 0;
			int a = sc.nextInt();
			int b = sc.nextInt();
			int k = (int) Math.log10(a);
			HashSet<Integer> checked = new HashSet<Integer>();
			for (int j = a; j <= b; j++) {
				if(checked.contains(j))
					continue;
				HashSet<Integer> set = new HashSet<Integer>();
				set.add(j);
				int curr = j;
				for (int l = 0; l <= k; l++) {
					int firstDig = curr / (int) Math.pow(10, k);
					int mod = curr % (int) Math.pow(10, k);
					curr = mod * 10 + firstDig;
					if ((int) Math.log10(curr) == k) {
						if (a<=curr && curr <=b) {
							set.add(curr);
						}
					}
				}
				if (set.size() > 1){
					Iterator<Integer> p = set.iterator();
					for(int m = 0;m<set.size();m++){
						int P = p.next();
						checked.add(P);
					}
					hold[i] += set.size() * (set.size() - 1) / 2;
				}
			}
		}
		try {
			// Create file
			FileWriter fstream = new FileWriter("out.txt");
			BufferedWriter out = new BufferedWriter(fstream);
			for (int i = 0; i < n; i++) {
				out.write("Case #" + (1 + i) + ": " + hold[i]);
				if (i < n - 1)
					out.write("\n");
			}
			out.close();
		} catch (Exception e) {// Catch exception if any
			System.err.println("Error: " + e.getMessage());
		}
	}
}
