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.io.*;
import java.util.*;
import java.awt.*;
import static java.lang.System.*;

public class C {
	public static void main (String [] args) throws IOException {new C().run();}
	public void run() throws IOException{
		Scanner file = new Scanner(new File("C-large.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("C.out")));
		
		int times = file.nextInt();
		for(int asdf = 0; asdf<times; asdf++){
			//System.out.println (asdf);
			int a = file.nextInt(), b = file.nextInt();
			HashSet<Point> set = new HashSet<Point>();
			for(int i = a; i<=b; i++){
				String s = ""+i;
				for(int j = 1; j<s.length(); j++){
					if( s.charAt(j) >= s.charAt(0) ){
						int x = Integer.parseInt(s.substring(j,s.length()) +s.substring(0,j));
						if( i<x && x<=b ){set.add(new Point(i,x));
						//System.out.println (i +" " + x);
						}
					}
				}
			}
			out.println("Case #"+(asdf+1)+": "+set.size());
		}
		out.close();
		System.exit(0);
	}
}