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.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;




public class Numbers {
	
	public static FileReader fr;
	public static BufferedReader br;
	public static FileWriter fw;
	public static BufferedWriter bw;
	
	
	public void read(String path) throws Exception
	{
		 fr = new FileReader(path);
		
		 br=new BufferedReader(fr);
	
	}
	
	
	public void write(String path) throws Exception
	{
		
	}
	
	public void execute(BufferedReader br,String path)throws Exception
	{
		
		String s;
		
		fw =new FileWriter(path,false);
		bw=new BufferedWriter(fw);
		s=br.readLine();	
		int i1=1;
		
		while((s=br.readLine())!=null)
		{
			int count =0;
			String st[]=s.split("\\s");
			int a=Integer.parseInt(st[0]);
			int b=Integer.parseInt(st[1]);
			
			
			
			for(int i=a;i<=b;i++)
			{
				int temp=i;
				String abc=Integer.toString(temp);
				int length=abc.length();
				int index=length-1;
				String tempString=abc;
				while(index>0)
				{
				
					String first=tempString.substring(0, index);
					String second=tempString.substring(index,length);
					abc=second+first;
					int newnumber=Integer.parseInt(abc);
					if((newnumber<=b && newnumber>temp )&& !abc.startsWith("0") && (Integer.toString(temp).length())==abc.length())
						count++;
					
					index--;
						
				}
			}
			
			bw.write("Case #"+ i1++ +": " +count +"\n");
			
			
			
			
		
		}
		bw.close();
		fr.close();
		
		
	}
	public static void main(String[] args) throws Exception
	
	{
		Numbers t=new Numbers();
		t.read("E:\\codejam\\Files\\C.in");
		t.execute(br,"E:\\codejam\\Files\\C.out");
	
		
	}

}
