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.*;

public class Test {

	public static void main(String[] args) throws Exception {
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
		int num = Integer.parseInt(br.readLine());
		int nline = 1;
		String line;
		while ((line = br.readLine()) != null && nline <=num) {
			String[] tok = line.split(" ");
			int size = tok[0].length();
			double result = 0;
			if (size != 1) {
				int A = Integer.parseInt(tok[0]);
				int B = Integer.parseInt(tok[1]);
				for (int i = A; i <= B; i++) {
					int n = size;
					String str = Integer.toString(i);
					for (int j = 1; j < size; j++) {
						String str2 = str.substring(j) + str.substring(0, j);
						if ((Integer.parseInt(str2) < A) || (Integer.parseInt(str2) > B) || (Integer.parseInt(str2) == Integer.parseInt(str)))
							--n;
					}
					if (n >= 2)
						result += n * (n-1) / 2.0 * 1.0 / n;
				}
			}
			System.out.println("Case #" + nline + ": " + (int) result);
			nline++;
		}

	}		

}


