package fixjava;

public class StringUtils {

	/** Repeat the given string the requested number of times. */
	public static String repeat(String str, int numTimes) {
		StringBuilder buf = new StringBuilder(Math.max(0, str.length() * numTimes));
		for (int i = 0; i < numTimes; i++)
			buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the left hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padLeft(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(padChar);
		for (int i = 1, mi = bufSize - str.length(); i < mi; i++)
			buf.append(padChar);
		buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the right hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padRight(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(str);
		buf.append(padChar);
		while (buf.length() < bufSize)
			buf.append(padChar);
		return buf.toString();
	}

	/** Intern all strings in an array, skipping null elements. */
	public static String[] intern(String[] arr) {
		for (int i = 0; i < arr.length; i++)
			arr[i] = arr[i].intern();
		return arr;
	}

	/** Intern a string, ignoring null */
	public static String intern(String str) {
		return str == null ? null : str.intern();
	}

}

import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;

public class C {
	// public final static String IN_FILE = "C.in";
	// public final static String OUT_FILE = "C.out";

	// public final static String IN_FILE = "C-small-attempt1.in";
	// public final static String OUT_FILE = "C-small-attempt1.out";

	public final static String IN_FILE = "C-large.in";
	public final static String OUT_FILE = "C-large.out";

	private static Scanner IN;

	public static void main(String[] args) throws Exception {
		InputStream in = new FileInputStream(IN_FILE);
		PrintWriter out = new PrintWriter(new FileWriter(OUT_FILE));
		IN = new Scanner(in);

		int T = IN.nextInt();
		for (int t = 1; t <= T; t++) {
			int n = IN.nextInt();
			int m = IN.nextInt();

			int l = 0;
			int k = 1;
			while (k <= n) {
				k *= 10;
				l++;
			}
			k /= 10;

			int c = 0;
			for (int i = n; i <= m; i++) {
				Set<Integer> p = new TreeSet<Integer>();
				int s = i;
				for (int j = 0; j < l; j++) {
					int r = s / 10 + (s % 10) * k;
					if (r > i && r <= m) {
						p.add(r);
					}
					s = r;
				}
				c += p.size();
			}
			out.println("Case #" + t + ": " + c);
		}

		out.flush();
		out.close();
		in.close();
	}
}
