
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;
import java.io.File;
import java.io.IOException;
import java.io.FileWriter;
import java.io.BufferedWriter;

public class Recycle
{
	public static void main(String[] args)
	{
/*		Set<Integer> perms = getPermutations(123456);
		
		for(Integer i: perms)
			System.out.println(i);*/
	
		try
		{
			Scanner s = new Scanner(new File("recycle.in"));
			BufferedWriter w = new BufferedWriter(new FileWriter(new File("recycle.out")));
			int numCases = s.nextInt();
			s.nextLine();
			
			for(int n = 1;n <= numCases; n++)
			{
				int A = s.nextInt();
				int B = s.nextInt();
				int count = 0;
				for(int k = A; k <= B; k++)
				{
					count += getNumPairs(k, B);
				}
				
				w.write("Case #" + n + ": " + count + "\n");
			}
			
			w.flush();
			w.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
	
	public static int getNumPairs(int n, int B)
	{
		Set<Integer> possibles = getPermutations(n);
		int count = 0;
		for(Integer i : possibles)
			if(i > n && i <= B)
				count++;
		return count;
	}
	
	public static Set<Integer> getPermutations(int n)
	{
		Set<Integer> perms = new TreeSet<Integer>();
		char[] digits = String.valueOf(n).toCharArray();
		
		for(int firstPos = 1; firstPos < digits.length; firstPos++)
		{
			String toBuild = "";
			for(int k = 0; k < digits.length; k++)
				toBuild += digits[(firstPos + k) % digits.length];
			perms.add(Integer.parseInt(toBuild));
		}
		return perms;
	}
	

}
import java.io.*;
import java.util.*;


public class RecycledNumbers {

	public static void main(String[] args) {
		Scanner sc = null;
		PrintWriter fout = null;
		int t = 0;

		try {
			sc = new Scanner(new File(args[0]));
			fout = new PrintWriter(new BufferedWriter(new FileWriter("result.txt")));
			t = sc.nextInt();
		} catch(Exception e) {
			System.out.println(e);
		}
		
		for( int i = 0; i < t; i++ ) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			boolean[] memo = new boolean[b+1];
			
			int digit = 1;
			while( digit * 10 <= a ) {
				digit *= 10;
			}
			
			long ret = 0;
			for( int j = a; j <= b; j++ ) {
				if( memo[j] ) continue;
				
				if( digit * 10 <= j ) {
					digit *= 10;
				}
				
				int tmp = j, dr = 1;
				do {
					int aa = tmp % 10;
					tmp = ( tmp / 10 ) + digit * aa;
					if( tmp > j && tmp <= b ) {memo[tmp] = true;
						ret += dr;
						dr++;					
					}
				} while( tmp != j );
			}
			
//			System.out.println("Case #" + (i+1) + ": " + ret);
			fout.println("Case #" + (i+1) + ": " + ret);
		}

		fout.close();
		sc.close();
	}

}
