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 Recycled {

    private static int solve(int A, int B) {
        int count = 0;
        HashSet<Integer> s = new HashSet<Integer>();

        for (int n = A; n < B; n++) {
            String i = n + "";
            s.clear();
            int t = i.length();

            while (i.charAt(t-1) == '0')
                t--;
            
            for (int j = 1; j < t; j++) {
                int m = Integer.parseInt(i.substring(j) + i.substring(0, j));
                if (n < m && m <= B)
                    s.add(m);
            }
            
            count += s.size();
        }

        return count;
    }

    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);

        int N = in.nextInt();

        for (int i = 0; i < N; i++) {
            System.out.println("Case #" + (i+1) + ": " + 
                               solve(in.nextInt(), in.nextInt()));
        }
    }
}
