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 RecycledNumbers {

	public static void main(String[] args) throws IOException {
		BufferedReader bfr = new BufferedReader(
				new InputStreamReader(System.in));
		PrintWriter pr = new PrintWriter(System.out);
		int n = Integer.parseInt(bfr.readLine());
		for (int i = 1; i <= n; i++) {
			String input[] = bfr.readLine().split(" ");
			int max = Integer.parseInt(input[1]);
			int count = 0;
			int min = Integer.parseInt(input[0]);
			for (; min < max; min++) {
				String moved = String.valueOf(min).charAt(
						String.valueOf(min).length() - 1)
						+ String.valueOf(min).substring(0,
								String.valueOf(min).length() - 1);
				if (Integer.parseInt(moved) <= max
						&& Integer.parseInt(moved) > min)
					count++;
				while (Integer.parseInt(moved) != min) {
					moved = moved.charAt(moved.length() - 1)
							+ moved.substring(0, moved.length() - 1);
					if (Integer.parseInt(moved) <= max
							&& Integer.parseInt(moved) > min)
						count++;
				}
			}
			pr.printf("Case #%d: %d\n", i, count);
			pr.flush();
		}
	}
}
