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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

/**
 * C.java
 * @author Joel C. Soares
 */

import java.util.Scanner;
import java.util.HashSet;
 
public class C 
{
	public static int inv( int n, int l )
	{
		int x = n % 10, p = ( int ) Math.pow( 10, l - 1 );
		
		for( int i = 0; i < l - 1; i++ )
		{			
			x = x * 10 + n / p;
			n = n % p;
			p = p / 10;
		}
		
		return x;
	} // fim de método
	
	public static int length( int n )
	{	
		int i = 0;
	
		if( n == 0 )
			return 1;
			
		while( n != 0 )
		{
			n = n / 10;
			i++;
		}
		
		return i;
	} 
	
	public static void main( String args[] )
	{
		Scanner input = new Scanner( System.in );
		int t, a, b, n, q, p, l, total, count;
		HashSet<Integer> set = new HashSet<Integer>();
		
		t = input.nextInt();
		for( int i = 0; i < t; i++ )
		{
			a = input.nextInt();
			b = input.nextInt();
			
			// computa resultado
			set.clear();
			total = 0;
			for( n = a; n < b; n++ )
			{
				q = n;
				l = length( q );
				set.add( q );
				count = 1;
				
				for( int j = 0; j < l - 1; j++ )
				{			
					q = inv( q, l );
					
					// verifica restricoes
					if( q >= a && q <= b && !set.contains( q ) )
					{
						set.add( q );
						count++;
					} // fim de if
				} 
				total += ( count - 1 ) * count / 2;
			} // fim de for
			
			System.out.printf( "Case #%d: %d\n", i + 1, total );
		} 	
	}
}