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 tr0llhoehle.cakemix.utility.googleCodeJam;

import java.text.ParseException;

/**
 * This class is a base class for all concrete problems. It is used to define
 * some methods necessary for the IOManager to work. It is crucial that the
 * addValue-Method gets extended and called (super.addValue(o)) by the extending
 * class.
 * 
 * @author Cakemix
 * @see IOManager
 * @see Solver
 */
public abstract class Problem {

    protected SupportedTypes[] types;
    protected int cntr = 0;
    protected boolean isInitialised = false;

    /**
     * Returns an array of SupportedTypes which define exactly what data is
     * stored in this problem.
     * 
     * The attribute "types" needs to be initialized in the constructor of the
     * extending class.
     * 
     * @return An array of SupportedTypes which define exactly what data is
     *         stored in this problem.
     * @see SupportedTypes
     */
    public SupportedTypes[] getTypes() {
	return types;
    }

    public void addValue(Object o) throws ParseException {
	if (!isInitialised) {
	    cntr++;
	    isInitialised = (cntr == types.length);
	} else {
	    throw new ParseException("Tried to add another value to this Problem even though all values are set.", cntr);
	}
    }
}
