import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.StringTokenizer;



class roundThree {
    public static void main(String[] args) {
    	String text = "";
    	if( args.length > 0) {
    		text = args[0];
    	} else {
	    	try {
				FileInputStream fos = new FileInputStream( "text3.txt");
			    Scanner scanner = new Scanner(new FileInputStream("text3.txt"));
			    try {
			      while (scanner.hasNextLine()){
			        text += scanner.nextLine() + "\n";
			      }
			    }
			    finally{
			      scanner.close();
			    }
				try {
					fos.read();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    	}
    
    	StringTokenizer st = new StringTokenizer(text, "[\r\n]+", false);
    	int cases = Integer.parseInt(st.nextToken());
    	
        for (int x=1; x<= cases; x++) {
        	
        	StringTokenizer st2 = new StringTokenizer(st.nextToken(), "[ ]+", false);
        	
        	int small = Integer.parseInt(st2.nextToken());
        	int large = Integer.parseInt(st2.nextToken());
        	ArrayList keep_track = new ArrayList<Integer>();
        	String small_int = "" + small;
        	int count = 0;
        	int small_length = small_int.length();
        	for( int i = small; i < large; i++) {
        		String number1 = "" + i;
        		keep_track.clear();
        		for( int j = 1; j < small_length; j++) {
        			String sub_2 = number1.substring(0,j);
        			String sub_1 = number1.substring(j,small_length);
        			int variation = Integer.parseInt( sub_1 + sub_2 );
        			if( variation > i && variation <= large && !keep_track.contains(variation)) {
        				keep_track.add(variation);
        				count++;
        			}
        		}
        	}
            System.out.println( "Case #" + x + ": " + count);
        }
    }
}