/*
 * 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;


public class Recycle {
	public static void main(String args[])
	{		
		int t;
		int save[] = new int[50];
		Scanner kb = new Scanner(System.in);
		t = kb.nextInt();
		int a,b;
		for(int i=0;i<t;i++)
		{
			a = kb.nextInt();
			b = kb.nextInt();
			int change = 0;
			int count = 0;
			System.out.print("Case #"+(i+1)+": ");
			
			for(int j=a;j<=b;j++)
			{
				
				String s = Integer.toString(j); 
				int x=0;
				for(int start=1;start<s.length();start++)
				{
					int max=0;
					change = 0;
					for(int k=start-1;max<s.length();max++,k--)
					{
						if(k<0) k = s.length()-1;
						change = change + (s.charAt(k)-'0')*((int)Math.pow(10,max));
						if(max==s.length()-1)
						{
							save[x++] = change;
						}
						
					}
					if(change<=b && change>=a && change!=j && change>j) 
					{
						int point=0;
						for(int y=0;y<x-1;y++)
						{
							if(save[y]==change) 
							{
								point=1;
								break;
							}
						}
						if(point==0)
						{	
							count++;
						}
					}
				}
			}
			System.out.println(count);
		}
		
	}
}
