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 codejam2012;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

/**
 *
 * @author acer
 */
public class C {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws FileNotFoundException, IOException {
        // TODO code application logic here
        FileInputStream input = new FileInputStream("input.txt");
        DataInputStream in = new DataInputStream(input);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));

        FileOutputStream output = new FileOutputStream("output.txt");

        int T = Integer.parseInt(br.readLine());
        int A, B;

        for (int i = 0; i < T; i++) {
            String[] temp = br.readLine().split(" ");
            A = Integer.parseInt(temp[0]);
            if (A < 12) {
                A = 12;
            }
            B = Integer.parseInt(temp[1]);
            if (B < A) {
                output.write(("Case #" + (i + 1) + ": " + "0" + "\n").getBytes());
                continue;
            }
            int j = A, count = 0;

            while (j <= B) {
                String thisNo = new Integer(j).toString();
                Set<Integer> intSet = new HashSet<Integer>();
                for (int k = 1; k < thisNo.length(); k++) {
                    int newNo = Integer.parseInt(thisNo.substring(thisNo.length() - k) + thisNo.substring(0, thisNo.length() - k));
                    if (newNo <= B && Integer.parseInt(thisNo) < newNo && !intSet.contains(newNo)) {
                        count++;
                        intSet.add(newNo);
                    }
                }
                j++;
            }
            output.write(("Case #" + (i + 1) + ": " + count + "\n").getBytes());
        }
    }
}
