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.*;
import java.util.StringTokenizer;

public class CodeJam1 {
	
	static BufferedReader br;
	static PrintWriter pw;
	
	static int a,b,count;
	
	public static void main(String[] args)throws Exception{
		br=new BufferedReader (new FileReader ("in.txt"));
		pw=new PrintWriter (new FileWriter("out.txt"));
		
		int n=Integer.parseInt( br.readLine() );
		for (int i=1;i<=n;i++){
			input();
			work();
			
			pw.printf("Case #%d: %d%n",i,count);
		}
		
		pw.close();
	}
	
	public static void input()throws Exception{
		StringTokenizer data=new StringTokenizer(br.readLine());
		
		a=Integer.parseInt( data.nextToken() );
		b=Integer.parseInt( data.nextToken() );
		count=0;
	}
	
	public static void work(){
		for (int i=a;i<=b;i++){
			StringBuffer sbuf=new StringBuffer(String.valueOf(i));
			
			int create;
			do{
				sbuf.append(sbuf.charAt(0));
				sbuf.deleteCharAt(0);
				create=Integer.parseInt( sbuf.toString() );
				
				if (create>i & create<=b)
					count++;
				
			}while(create!=i);
		}
	}
}