/*
 * 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.*;
import java.util.*;
public class ReNu {

	public static void main(String[] args)
	{
		Scanner scan = null;
		PrintWriter outStream = null;
		try
		{
			outStream = new PrintWriter(new FileOutputStream("c_out.txt"));
			scan = new Scanner(new FileInputStream("C-small-attempt0.in"));
		}catch (FileNotFoundException e)
		{
			System.out.println("File not found!");
			System.exit(0);
		}
		
		int lines = scan.nextInt();
		for(int i = 0;i < lines; i++)
		{
			
			int ans = 0;
			int a = scan.nextInt();
			int b = scan.nextInt();
			for(int j = a; j<b+1;j++)
			{
				
				int digit = 1;
				int temp = j/10;
				
				while(temp > 0)
				{
					temp = temp/10;
					digit++;
				}
				temp = j;
				int[] array = new int[digit];
				for(int k = digit-1; k>0; k--)
				{
					int rem = temp%10;
					temp = temp/10;
					temp += rem*Math.pow(10, digit-1);
					array[k] = temp;
					if(temp>j)
						if(temp<b+1)
						{
							boolean notvalid = false;
							for(int x = k+1;x<array.length;x++)
							{
								if(array[x] == temp)
									notvalid = true;
							}
							
							if(!notvalid)
								ans++;
						}
				}
				
			}
			outStream.println("Case #" + (i+1) + ": " + ans);
		}
		outStream.close();

	}
}