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();
		}
	}
}

/*************************************************************************
 *  Compilation:  javac StdOut.java
 *  Execution:    java StdOut
 *
 *  Writes data of various types to standard output.
 *
 *************************************************************************/

import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Locale;

/**
 *  <i>Standard output</i>. This class provides methods for writing strings
 *  and numbers to standard output.
 *  <p>
 *  For additional documentation, see <a href="http://introcs.cs.princeton.edu/15inout">Section 1.5</a> of
 *  <i>Introduction to Programming in Java: An Interdisciplinary Approach</i> by Robert Sedgewick and Kevin Wayne.
 */
public final class StdOut {

    // force Unicode UTF-8 encoding; otherwise it's system dependent
    private static final String UTF8 = "UTF-8";

    // assume language = English, country = US for consistency with StdIn
    private static final Locale US_LOCALE = new Locale("en", "US");

    // send output here
    private static PrintWriter out;

    // this is called before invoking any methods
    static {
        try {
            out = new PrintWriter(new OutputStreamWriter(System.out, UTF8), true);
        }
        catch (UnsupportedEncodingException e) { System.out.println(e); }
    }

    // singleton pattern - can't instantiate
    private StdOut() { }

    // close the output stream (not required)
   /**
     * Close standard output.
     */
    public static void close() {
        out.close();
    }

   /**
     * Terminate the current line by printing the line separator string.
     */
    public static void println() {
        out.println();
    }

   /**
     * Print an object to standard output and then terminate the line.
     */
    public static void println(Object x) {
        out.println(x);
    }

   /**
     * Print a boolean to standard output and then terminate the line.
     */
    public static void println(boolean x) {
        out.println(x);
    }

   /**
     * Print a char to standard output and then terminate the line.
     */
    public static void println(char x) {
        out.println(x);
    }

   /**
     * Print a double to standard output and then terminate the line.
     */
    public static void println(double x) {
        out.println(x);
    }

   /**
     * Print a float to standard output and then terminate the line.
     */
    public static void println(float x) {
        out.println(x);
    }

   /**
     * Print an int to standard output and then terminate the line.
     */
    public static void println(int x) {
        out.println(x);
    }

   /**
     * Print a long to standard output and then terminate the line.
     */
    public static void println(long x) {
        out.println(x);
    }

   /**
     * Print a short to standard output and then terminate the line.
     */
    public static void println(short x) {
        out.println(x);
    }

   /**
     * Print a byte to standard output and then terminate the line.
     */
    public static void println(byte x) {
        out.println(x);
    }

   /**
     * Flush standard output.
     */
    public static void print() {
        out.flush();
    }

   /**
     * Print an Object to standard output and flush standard output.
     */
    public static void print(Object x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a boolean to standard output and flush standard output.
     */
    public static void print(boolean x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a char to standard output and flush standard output.
     */
    public static void print(char x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a double to standard output and flush standard output.
     */
    public static void print(double x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a float to standard output and flush standard output.
     */
    public static void print(float x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print an int to standard output and flush standard output.
     */
    public static void print(int x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a long to standard output and flush standard output.
     */
    public static void print(long x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a short to standard output and flush standard output.
     */
    public static void print(short x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a byte to standard output and flush standard output.
     */
    public static void print(byte x) {
        out.print(x);
        out.flush();
    }

   /**
     * Print a formatted string to standard output using the specified
     * format string and arguments, and flush standard output.
     */
    public static void printf(String format, Object... args) {
        out.printf(US_LOCALE, format, args);
        out.flush();
    }

   /**
     * Print a formatted string to standard output using the specified
     * locale, format string, and arguments, and flush standard output.
     */
    public static void printf(Locale locale, String format, Object... args) {
        out.printf(locale, format, args);
        out.flush();
    }

    // This method is just here to test the class
    public static void main(String[] args) {

        // write to stdout
        StdOut.println("Test");
        StdOut.println(17);
        StdOut.println(true);
        StdOut.printf("%.6f\n", 1.0/7.0);
    }

}
