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){}
	}
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Saransh
 */
import java.io.*;
import java.util.*;
import java.math.*;
import java.lang.*;


public class Main {

    static int pts[];
    static int n,s,p;
    static int memo[][];
    static boolean marked[][];
    public static void main(String[] args)
    {
        try
        {
            Scanner sc=new Scanner(System.in);
            int t=sc.nextInt();
			int test=1;
            while(t-->0)
            {
                int A=sc.nextInt();
				int B=sc.nextInt();
				int count=0;
				for(int i=A;i<=B;i++)
				{
					String str=i+"";
					HashSet<Integer> set=new HashSet<Integer>();
					for(int i1=0;i1<=str.length();i1++)
					{
						String tmp=str.substring(i1)+str.substring(0,i1);
						if(tmp.charAt(0)!='0')
						{
							int temp=Integer.parseInt(tmp);
							if(temp>i&&temp<=B&&!set.contains(temp))
							{
								set.add(temp);
								count++;
							}	
						}
					}
				}
				System.out.println("Case #"+test+": "+count);
				test++;
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    

}


