import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

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);
		}
	}
}
