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.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.StringTokenizer;


public class RecycledNumbers
{
	static BufferedReader br;
	static PrintWriter pw;
	
	static HashMap<String, Boolean> map;
	
	public static void main(String args[])throws IOException
	{
		initFiles();
		
		readFiles();
		
		System.out.println("Done");
	}
	
	private static void readFiles()throws IOException
	{
		int n = Integer.parseInt(br.readLine());
		
		for(int i=1; i<=n; i++)
		{
			System.out.println("Case: " + i);
			StringTokenizer tokens = new StringTokenizer(br.readLine());
			
			int A = Integer.parseInt(tokens.nextToken());
			int B = Integer.parseInt(tokens.nextToken());
			
			int count = findPairs(A, B);
			
			pw.println("Case #" + i + ": " + count);
		}
		
		pw.close();
		br.close();
	}
	
	private static int findPairs(int A, int B)
	{
		map = new HashMap<String, Boolean>();
		
		int numRecycleables = 0;
		for(int i = A; i <= B; i++)
		{
			numRecycleables += getNumRecycled(i, B);
		}
		
		return map.size();
	}
	
	private static int getNumRecycled(int n, int B)
	{
		String nStr = "" + n;
		
		int count = 0;
		for(int i = 1; i < nStr.length(); i++)
		{
			String mStr = nStr.substring(i) + nStr.substring(0, i);
			
			int m = Integer.parseInt(mStr);
			
			if(m > n && m <= B)
			{
				//System.out.println(n + "--> " + m);
				
				map.put(nStr + mStr, true);
				count++;
			}
		}
		
		return count;
	}
	
	private static void initFiles()throws IOException
	{
		br = new BufferedReader(new FileReader("C-large.in"));
		pw = new PrintWriter(new FileWriter("Recycle.out"));
	}
}
