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.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;

public class CodeJamC
{
	public static void main(String args[]) throws Exception
	{
		Scanner in = new Scanner(new File("in.txt"));
		BufferedWriter out = new BufferedWriter(new FileWriter("out.txt"));
		int cases = in.nextInt();
		for(int casenum = 1;casenum <= cases;casenum++)
		{
			int a = in.nextInt();
			int b = in.nextInt();
			int count = 0;
			HashMap<Integer,ArrayList<Integer>> map = new HashMap<Integer,ArrayList<Integer>>();
			
			int len = ("" + a).length();

			for(int n = a;n <= b;n++)
			{
				int t = n;
				for(int i = 0;i<len-1;i++)
				{
					t = (t%10)*(int)(Math.pow(10,len-1)) + t/10;
					if(t > n && t <= b)
					{
						if(map.containsKey(n))
						{
							if(!map.get(n).contains(t))
							{
								count++;
								map.get(n).add(t);
							}
						}
						else
						{
							ArrayList<Integer> arr = new ArrayList<Integer>();
							arr.add(t);
							map.put(n,arr);
							count++;
						}
					}
				}
			}

			out.write("Case #" + casenum + ": " + count + "\n");
		}
		in.close();
		out.close();
	}
}