import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

package com.numbers.recycle.algo;

import java.util.ArrayList;
import java.util.List;

public class Recycler {
	
	public int getRecycledNumberCount(String[] wordsInOrder){
		int beginNumber = Integer.valueOf(wordsInOrder[0]);
		int endNumber = Integer.valueOf(wordsInOrder[1]);
		int counter = 0;
		for(int current = beginNumber ; current <= endNumber ; current++)
		{
			List<Integer> recycledNumbers = getRecycledNumbers(current);
			for(int recycledNumber: recycledNumbers)
			{
				if(beginNumber <= current 
						&& current < recycledNumber
						&& recycledNumber <= endNumber)
					counter ++;
			}
		}
		return counter;
	}

	private List<Integer> getRecycledNumbers(int i) {
		List<Integer> returnList = new ArrayList<Integer>();
		String number = String.valueOf(i);
		int length = number.length();
		for(int counter = 1; counter < length; counter++)
		{
			number = number.charAt(length - 1) + number.substring(0,length - 1);
			int numValue = Integer.valueOf(number);
			if(!returnList.contains(numValue))
			returnList.add(Integer.valueOf(number));
		}
		return returnList;
	}

}
