/*
 * 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.io.File;
import java.io.PrintWriter;
import java.util.Scanner;


public class Recycled {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try
		{
			Scanner scanner = new Scanner(new File("./data/inRecycled"));
			PrintWriter writer = new PrintWriter(new File("./data/outRecycled"));
			int t = scanner.nextInt();
			scanner.nextLine();
			for(int i = 0; i < t; i++) {
				int a = scanner.nextInt();
				int b = scanner.nextInt();
				
				int res = 0;
				
				String check = "" + a;
				if(check.length() != 1)
				{
					
					for(int j = a; j <= b; j++){
						
						if(check.length() == 2)
						{
							String temp = "" + j;
							String other1 = temp.charAt(1) + "" + temp.charAt(0);
							int ot = Integer.valueOf(other1);
							if( ot <= b && j < ot){
								res++;
							}
						}
						else if(check.length() == 3)
						{
							String temp = "" + j;
							String other1 = "" + temp.charAt(2) + temp.charAt(0) + temp.charAt(1);
							String other2 = "" + temp.charAt(1) + temp.charAt(2) + temp.charAt(0);
							
							int ot1 = Integer.valueOf(other1);
							int ot2 = Integer.valueOf(other2);
							
							if ( ot1 <= b && j < ot1) {
								res++;
							}
							if ( ot2 <= b && j < ot2) {
								res++;
							}
						}
					}
				}
				writer.println("Case #" + (i+1) + ": " + res);

			}
			writer.close();
			scanner.close();
			
		}catch(Exception e) {e.printStackTrace();}
	}

}
