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 String shift(String a, int d) {
        String end = a.substring(d, a.length());
        String start = a.substring(0, d);
        return end + start;
    }
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int t = s.nextInt();
        for (int ca = 0; ca < t; ca++) {
            long ct = 0;
            int A = s.nextInt(), B = s.nextInt();
            for (int a = A; a <= B; a++) {
                String astr = ""+a;
                HashSet<String> seen = new HashSet<String>();
                for (int l = 1; l < astr.length(); l++) {
                    String shift = shift(astr, l);
                    
                    int c = Integer.parseInt(shift);
                    if (!seen.contains(shift) && a < c && c <= B) {
                        seen.add(shift);
                        ct++;
                    }
                }
            }
            System.out.printf("Case #%d: %d\n",ca+1,ct);
        }
	}
}
