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.util.HashSet;

public class Recycle
{
  public static void main(String[] args)
  {
    Scanner in = new Scanner(System.in);
    
    int nums = in.nextInt();
    
    for (int p = 0; p < nums; p++)
    {
      
      int a = in.nextInt();
      int b = in.nextInt();
      
      int length = (a + "").length();
      int pairs = 0;
      int numRepeats = 0;
      
      for (int f = a; f <= b; f++)
      {
        int temp = f;
        int save = temp;
        HashSet<Integer> set = new HashSet<Integer>();
        for (int i = 0; i < length; i++)
        {
          // bring to front
          int last = temp % 10;
          temp = temp / 10;
          temp += last * Math.pow(10, length - 1);
          
          if (temp > save && temp >= a && temp <= b && !set.contains(temp))
          {
            pairs++;
            set.add(temp);
          }
        }
        

      }
      System.out.println("Case #" + (p + 1) + ": " + (pairs  - numRepeats));
    }
  }
}