package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.HashMap;


public class Recycled {

	
	public static void main(String args[]) {
		try {
		BufferedReader br=new BufferedReader(new InputStreamReader(new FileInputStream("c:\\gcj\\C\\C-small-attempt0.in")));
		String line=br.readLine();
		PrintStream ps=new PrintStream("c:\\gcj\\C\\C-Small.out");
		
		int n=Integer.parseInt(line);
			for(int i=1;i<=n;i++) {
				
				line=br.readLine();
				String[] nums=line.split(" ");
				long A=Long.parseLong(nums[0]);
				long B=Long.parseLong(nums[1]);
				ps.println("Case #"+i+": "+getCount(A,B));
										
			}
		} 
		catch(Exception e) {
			e.printStackTrace();
		}
	}
	
}
