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){}
	}
}
//Kholofelo Moyaba
//Problem C codejam
//14 April 2012

import java.util.Scanner;

class RecycledNumbers
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        int cases = input.nextInt();
        for(int i=1;i<=cases;i++)
        {
            int a = input.nextInt();
            int b = input.nextInt();
            int digits = (a+"").length()-1;//number of digits -1
            int factor = 1;//factor in order of a and b
            for(int j=0;j<digits;j++,factor*=10);//factor=10^digit
            int result = 0;
            for(int n=a;n<b;n++){
                int[] buffer = new int[digits];//current pairs
                int m = n;//rotation of n into m
                for(int j=0;j<digits;j++){
                    m = m/10 + (m%10)*factor;//rotate
                    if(m<=b && n<m)//recycled pair
                    {//check if duplicate
                        boolean distinct = true;
                        for(int k=0;k<j;k++)
                            if(buffer[k]==m)
                            {
                                distinct = false;
                                break;
                            }
                        if(distinct)
                        {
                            result++;
                            buffer[j] = m;
                        }
                    }
                }
            }
            System.out.println("Case #"+i+": "+result);
        }
    }
}