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();
		}
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package javaapplication7;

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

/**
 *
 * @author ucho
 */
public class JavaApplication7 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        //BitSet counted = new BitSet(2000000);
        PrintWriter writer = new PrintWriter(new FileWriter("output"));
        Scanner scanner = new Scanner(new FileReader("input"));
        int tests = scanner.nextInt();
        scanner.nextLine();
        for(int t=0;t<tests;t++) {
            int from = scanner.nextInt();
            int to = scanner.nextInt();
            int count = 0;
            for (int n = from; n <= to; n++) {
                String asString = String.valueOf(n);
                Set<String> used = new HashSet<String>();
                for(int j=1;j<asString.length();j++) {
                    String tmp = asString.substring(j)+asString.substring(0,j);
                    if (tmp.startsWith("0")) {
                        continue;
                    }
                    if (used.contains(tmp)) {
                        continue;
                    }
                    int intTmp = Integer.valueOf(tmp);
                    if (intTmp>=from && intTmp<=to && intTmp> n) {
                        count++;
                        used.add(tmp);
                    }
                }
            }
            String msg = "Case #"+(t+1)+": "+count;
            System.out.println(msg);
            writer.println(msg);
            scanner.nextLine();
        }
        writer.close();
        
    }
}
