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.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import java.util.StringTokenizer;


public class C {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new FileReader("C-large.in"));
		PrintWriter out =new PrintWriter(new FileWriter("C-large.out"));
		int T = Integer.parseInt(br.readLine());		
		
		
		
		for(int i = 0; i <T;i++)
		{
			
			String input = br.readLine();
		
			StringTokenizer st = new StringTokenizer(input);
			int n = new Integer(st.nextToken());
			int m = new Integer(st.nextToken());
			int count =0;
			for(int j=n;j<=m;j++)
			{
				Set s = new HashSet();
				int k = j;
				int b=10;
				while(k/b>0)
				{
					int first = k/b;
					int second = k%b;
					String res = Integer.toString(second)+Integer.toString(first);
					int ires = Integer.parseInt(res);
					if(ires != j&& ires>j && ires <=m )	
					{
						count++;
						
					}
					if(ires==j)
						break;
					b=b*10;
				}
							
			} 
						
			out.println("Case #"+(i+1)+": " +count);
		}
			
		br.close();
		out.close();
		}
	}

