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;
	}

}

/*
choochootrain
Google Code Jam 2012
*/
import java.io.*;
import java.util.*;

class ProblemC 
{
  public static Set<String> seen;
  public static int a;
  public static int b;

  public static void main (String [] args) throws IOException 
  {
    String filename = "C-small-attempt0";  
    BufferedReader f = new BufferedReader(new FileReader(filename + ".in"));
    PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(filename + ".out")));
    int numberOfTests = Integer.parseInt(f.readLine());
    seen = new HashSet<String>();
    for(int n = 1; n <= numberOfTests; n++)
    {
      StringTokenizer st = new StringTokenizer(f.readLine());
      a = Integer.parseInt(st.nextToken());
      b = Integer.parseInt(st.nextToken());

      for(int i = a; i <= b; i++) {
        findNumRotations(i);
      }
      
      int solution = seen.size();
      out.println("Case #" + n + ": " + solution);

      seen = new HashSet<String>();
    }
    out.close();

    System.exit(0);
  }

  public static void findNumRotations(int num) {
    int numRots = getRotationCount(num);

    for(int i = 1; i <= numRots; i++) {
      int rotated = rotate(num, i, numRots + 1);
      if (rotated > num && rotated <= b) {
        seen.add(num + " " + rotated);
        System.out.println(num + " " + rotated);
      }
    }
  }

  private static int rotate(int num, int amt, int digits) {
    int bottom = (int)(num / Math.pow(10, amt));
    int top = (int)(num % Math.pow(10, amt));

    return (int)(top * Math.pow(10, digits - amt) + bottom);
  }

  private static int getRotationCount(int num) {
    if (num < 10)
      return 0;

    int c = 0;
    while(num > 0) {  
      num = num / 10;
      c++;
    }

    return c - 1;
  }
}
