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){}
	}
}
import java.util.*;
public class c 
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		int T = input.nextInt();
		for(int t = 1; t<=T; t++)
		{
			System.out.print("Case #" + t + ": ");
			int a = input.nextInt();
			int b = input.nextInt();
			int count = 0;
			for(int i = a; i<=b; i++)
			{
				if(i >= 1000000)
				{
					int next = 1000000*(i%10)+i/10;
					if(next > i && next <= b)
						count++;
					int next2 = 100000*(i%100) + i/100;
					if(next2 > i && next2 <= b && next != next2)
						count++;
					int next3 = 10000*(i%1000)+i/1000;
					if(next3 > i && next3 <= b && next != next3 && next2 != next3)
						count++;
					int next4 = 1000*(i%10000) + i/10000;
					if(next4 > i && next4 <= b && next != next4 && next2 != next4 && next3 != next4)
						count++;
					int next5 = 100*(i%100000) + i/100000;
					if(next5 > i && next5 <= b && next != next5 && next2 != next5 && next3 != next5 && next4 != next5)
						count++;
					int next6 = 10*(i%1000000)+i/1000000;
					if(next6 > i && next6 <= b && next != next6 && next2 != next6 && next3 != next6 && next4 != next6 && next5 != next6)
						count++;
				}
				else if(i >= 100000)
				{
					int next = 100000*(i%10) + i/10;
					if(next > i && next <= b)
						count++;
					int next2 = 10000*(i%100)+i/100;
					if(next2 > i && next2 <= b && next != next2)
						count++;
					int next3 = 1000*(i%1000) + i/1000;
					if(next3 > i && next3 <= b && next != next3 && next2 != next3)
						count++;
					int next4 = 100*(i%10000) + i/10000;
					if(next4 > i && next4 <= b && next != next4 && next2 != next4 && next3 != next4)
						count++;
					int next5 = 10*(i%100000)+i/100000;
					if(next5 > i && next5 <= b && next != next5 && next2 != next5 && next3 != next5 && next4 != next5)
						count++;
				}
				else if(i >= 10000)
				{
					int next = 10000*(i%10)+i/10;
					if(next > i && next <= b)
						count++;
					int next2 = 1000*(i%100) + i/100;
					if(next2 > i && next2 <= b && next2 != next)
						count++;
					int next3 = 100*(i%1000) + i/1000;
					if(next3 > i && next3 <= b && next3 != next && next3 != next2)
						count++;
					int next4 = 10*(i%10000)+i/10000;
					if(next4 > i && next4 <= b && next4 != next3 && next4 != next2 && next4 != next)
						count++;
				}
				else if(i >= 1000)
				{
					int next = 1000*(i%10) + i/10;
					if(next > i && next <= b)
					{
						count++;
					}
					int next2 = 100*(i%100) + i/100;
					if(next2 > i && next2 <= b && next != next2)
					{
						count++;
					}
					int next3 = 10*(i%1000)+i/1000;
					if(next3 > i && next3 <= b && next != next3 && next2 != next3)
					{
						count++;
					}
				}
				else if(i >= 100)
				{
					int next = 100*(i%10) + i/10;
					if(next > i && next <= b)
						count++;
					int next2 = 10*(i%100) + i/100;
					if(next2 > i && next2 <= b && next2 != next)
						count++;
				}
				else if(i >= 10)
				{
					int next = 10*(i%10) + i/10;
					if(next > i && next <=b)
						count++;
				}
			}
			System.out.println(count);
		}
	}
}
