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.util.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class  Main  {
	
	//ArrayList<Integer> lis = new ArrayList<Integer>();
	//ArrayList<String> lis = new ArrayList<String>();
	//ArrayList<test> lis = new ArrayList<test>();
	static long sum=0;
	
public  static void main(String[] args) throws IOException {
   //googlein.txt C-small-attempt0.in
	Scanner sc =new Scanner(new File("C-large.in"));
	  File file = new File("file.txt");
		PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
	//	sc.useDelimiter("(\\s)+|[,]");
		 int T=sc.nextInt();
		
	 	for(int k=1; k<=T; k++){
	 	 int c=0, a=sc.nextInt(),b =sc.nextInt();
	 	 
	 	 for(int t=a;t<=b;t++){
	 		String s=String.valueOf(t);
	 		
	 		int l=s.length(),g=1; 
	 		ArrayList<Integer> lis = new ArrayList<Integer>();
	 		for(int u=0;u<l;u++)g*=10; 
	 		
	 		for(int u=0,p=10;u<l-1;u++,p*=10){
	 		 //  int h= Integer.parseInt(s.substring(l-u-1,l-u));
	 			//if( h<1  )continue;
	 		   
	 			int e=(t%p)*(g/p),f=t/p,y=e+f;
	 			//db(t,y);
	 		  if( a<=y && y<=b && t<y && !lis.contains(y)){c++; lis.add(y);// db(t,y);
	 		  }	
	 			
	 			
	 	 }
	 
	 		
		 }
	 
	 	pw.println("Case #"+(k)+": "+c);
	 	}
	 	

	 	pw.flush();
	 	pw.close();  }



 

    static int ni(Scanner in){
	return in.nextInt();  
 }


    static void db(Object... os){
	         System.err.println(Arrays.deepToString(os));
 
	}

}
