import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Scanner;
import java.util.TreeSet;

// Recycled Numbers
// https://code.google.com/codejam/contest/1460488/dashboard#s=p2

public class C {

	private static String process(Scanner in) {
		int A = in.nextInt();
		int B = in.nextInt();
		int res = 0;
		int len = Integer.toString(A).length();
		for(int n = A; n < B; n++) {
			String str = Integer.toString(n);
			TreeSet<Integer> set = new TreeSet<Integer>();
			for(int i = 1; i < len; i++) {
				int m = Integer.parseInt(str.substring(i, len) + str.substring(0, i));
				if ( m > n && m <= B && ! set.contains(m) ) {
					set.add(m);
					res++;
				}
			}
		}
		return Integer.toString(res);
	}

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in.available() > 0 ? System.in : 
			new FileInputStream(Thread.currentThread().getStackTrace()[1].getClassName() + ".practice.in"));
		int T = in.nextInt();
		for(int i = 1; i <= T; i++) 
			System.out.format("Case #%d: %s\n", i, process(in));
	}
}

import java.util.*;

class Recycle
{
  public static int compute(int lowerBound, int upperBound)
  {
    int count = 0;
    int numDigits = 1 + (int)Math.log10(lowerBound);
    int new_num, cut;
    boolean[] check = new boolean[upperBound-lowerBound+1];
    boolean[] check2;
    
    if(lowerBound/10 == 0)
      return 0;
    else
    {
      for(int i = lowerBound; i <= upperBound-2; i++)
      {
        check[i-lowerBound] = true;
        check2 = new boolean[upperBound-lowerBound+1];
        for(int j = 1; j < numDigits; j++)
        {
          cut = i % (int)Math.pow(10,j);
          new_num = cut*(int)Math.pow(10,numDigits-j) + i/(int)Math.pow(10,j);
          if(new_num > i && new_num <= upperBound && !check[new_num-lowerBound] && !check2[new_num-lowerBound])
          {
            check2[new_num-lowerBound] = true;
            count++;
          }
        }
      }
    }
    return count;
  }
  
  public static void main(String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int numCase, lowerBound, upperBound;
    
    numCase = sc.nextInt();
    for(int i = 0; i < numCase; i++)
    {
      lowerBound = sc.nextInt();
      upperBound = sc.nextInt();
      System.out.println("Case #"+(i+1)+": "+compute(lowerBound,upperBound));
    }
  }
}