package jp.funnything.competition.util;

import java.math.BigInteger;

/**
 * Utility for BigInteger
 */
public class BI {
    public static BigInteger ZERO = BigInteger.ZERO;
    public static BigInteger ONE = BigInteger.ONE;

    public static BigInteger add( final BigInteger x , final BigInteger y ) {
        return x.add( y );
    }

    public static BigInteger add( final BigInteger x , final long y ) {
        return add( x , v( y ) );
    }

    public static BigInteger add( final long x , final BigInteger y ) {
        return add( v( x ) , y );
    }

    public static int cmp( final BigInteger x , final BigInteger y ) {
        return x.compareTo( y );
    }

    public static int cmp( final BigInteger x , final long y ) {
        return cmp( x , v( y ) );
    }

    public static int cmp( final long x , final BigInteger y ) {
        return cmp( v( x ) , y );
    }

    public static BigInteger div( final BigInteger x , final BigInteger y ) {
        return x.divide( y );
    }

    public static BigInteger div( final BigInteger x , final long y ) {
        return div( x , v( y ) );
    }

    public static BigInteger div( final long x , final BigInteger y ) {
        return div( v( x ) , y );
    }

    public static BigInteger mod( final BigInteger x , final BigInteger y ) {
        return x.mod( y );
    }

    public static BigInteger mod( final BigInteger x , final long y ) {
        return mod( x , v( y ) );
    }

    public static BigInteger mod( final long x , final BigInteger y ) {
        return mod( v( x ) , y );
    }

    public static BigInteger mul( final BigInteger x , final BigInteger y ) {
        return x.multiply( y );
    }

    public static BigInteger mul( final BigInteger x , final long y ) {
        return mul( x , v( y ) );
    }

    public static BigInteger mul( final long x , final BigInteger y ) {
        return mul( v( x ) , y );
    }

    public static BigInteger sub( final BigInteger x , final BigInteger y ) {
        return x.subtract( y );
    }

    public static BigInteger sub( final BigInteger x , final long y ) {
        return sub( x , v( y ) );
    }

    public static BigInteger sub( final long x , final BigInteger y ) {
        return sub( v( x ) , y );
    }

    public static BigInteger v( final long value ) {
        return BigInteger.valueOf( value );
    }
}

import java.io.*;
import java.util.Scanner;
class RecycledNumbers
{
	public static void main(String Args[]) throws Exception
	{
		Scanner s=new Scanner(new FileReader("inputCs.in"));
		BufferedWriter br=new BufferedWriter(new FileWriter("outputCs.txt"));
		int T, a, b,total=0;
		T=s.nextInt();
		String x,y;
		for(int I=0;I<T;I++)
		{
			total=0;
			a=s.nextInt();
			b=s.nextInt();
			for(int i=a;i<=b;i++)
			{
				for(int j=i+1;j<=b;j++)
				{
					x=new String(""+i);
					y=new String(""+j);
					if(recycled(x,y))
					{
						total++;
					}
				}
			}
			br.write("Case #"+(I+1)+": "+total);
			if(I!=T-1)
			br.write("\n");
		}
		s.close();
		br.close();
	}
	
	public static boolean recycled(String a,String b)
	{
		String d;
		char c[]=new char[a.length()];
		for(int i=0;i<a.length();i++)
		{
			c[0]=b.charAt(b.length()-1);
			b.getChars(0,b.length()-1,c,1);
			d=new String(c);
			if(d.contentEquals(a))
			return true;
			else 
			b=d;
		}
		return false;
	}
}