/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package recyclednumbers;

import java.util.HashSet;

/**
 *
 * @author vandit
 */
public class RecycleNumbers {

    private HashSet<String> numbers = new HashSet<String>();
    private HashSet<String> initialTempNumbers = new HashSet<String>();
    private HashSet<String> finalTempNumbers = new HashSet<String>();

    HashSet<Pair> numberPairs = new HashSet<Pair>();


    private void findRecycledNumbers(int start, int end, int places) {


        for (int i = start; i <= end; i++) {
            String initialNumber = Integer.toString(i);
            //if (!(numbers.contains(initialNumber) || finalTempNumbers.contains(initialNumber))) {

                StringBuffer tempNumber = new StringBuffer(initialNumber);
                int len = tempNumber.length();
                int startIndexToMove = len - places;
                String tempString = tempNumber.substring(startIndexToMove);
                if ((places == 1 && tempString.equals("0")) || tempString.charAt(0) == '0') {
                    continue;
                }
                tempNumber.delete(startIndexToMove, len);
                String finalTempNumber = tempString + tempNumber.toString();

                if (! (finalTempNumber.equals(initialNumber) || Integer.parseInt(finalTempNumber) > end || Integer.parseInt(finalTempNumber) < Integer.parseInt(initialNumber))) {
                    numbers.add(initialNumber);
                    finalTempNumbers.add(finalTempNumber);
                    Pair pair = new Pair(finalTempNumber,initialNumber);
                    numberPairs.add(pair);
                }
            }

        

    }

    public HashSet<Pair> findAllRecycledNumbers(int start, int end) {
        int length = Integer.toString(start).length();
        for (int i = 1; i < length; i++) {
            findRecycledNumbers(start, end, i);
        }
        return numberPairs;
    }
}

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();

  }
}