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.DataInputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;


public class gjam {
	
	public static void main(String[] args)
	{
	
		int TestCases = 0;
		int currentCase = 0;
		
		try
		{
			
		
			FileInputStream fstream = new FileInputStream("C-small-attempt0.in");
			DataInputStream dstream = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(dstream));
			
			String inputStr = br.readLine();
			
			TestCases = Integer.parseInt(inputStr);
			
			while(currentCase != TestCases)
			{
				ArrayList<Integer> results = new ArrayList<Integer>();
				inputStr = br.readLine();
				int result = 0;
				
				String[] inputs = inputStr.split(" ");
				int size = inputs[0].length();
				int A = Integer.parseInt(inputs[0]);
				int B = Integer.parseInt(inputs[1]);
				if(A >= 10 && B > A)
				for(int i = A; i <= B; i++)
				{
					for(int j = 1; j <= size; j++)
					{
						int moved = moveDigits(j,i);
						
						if(A <= i && i < moved && moved <= B)
						{
							
							results.add(i);
							results.add(moved);
							result++;
						}
						
					}
					
					
				}
				
				System.out.println("Case #" + (currentCase +1) + ": " + result);
				currentCase++;
			}
			
			
		}
		catch(Exception e)
		{
			System.err.println("Err: " + e.getMessage());
		}
		
	}
	public static int moveDigits(int numTomove,int input)
	{
		String original = "" + input;
		int length = original.length();
		String sub1 = original.substring(length - numTomove);
		String sub2 = original.substring(0,length - numTomove);
		
		String output = sub1 + sub2;
		
		return Integer.parseInt(output);
	}
	
}
