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.util.Scanner;
import java.io.*;

public class Prob3 {
  public static void main(String[] args) throws IOException{
    Scanner in = new Scanner(new File("D:/C-small-attempt0.in"));
    PrintStream out = new PrintStream(new File("D:/outputProb3.txt"));
    
    int lineAmount = Integer.parseInt(in.nextLine());
    
    for (int n = 1; n <= lineAmount; n++) {
      int a = in.nextInt();
      int b = in.nextInt();
      int count = 0;
      
      for (int i = a; i <= b; i++) {

        for (int j = ("" + i).length()-1;j>=1; j--) { 
          if (!("" + i).substring(j, j+1).equals("0")) {
            String temp = ("" + i).substring(j, ("" + i).length());
            String x = temp+("" + i).substring(0, j);
            if (Integer.parseInt(x) >= a && Integer.parseInt(x) <= b && i != Integer.parseInt(x)) {
              count++;
            }
          }
        }
      }
  
      int y = count/2;
      out.println("Case #"+n+": "+y);
    }
    
    in.close();
    out.close();

  }
}