
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;
import java.io.File;
import java.io.IOException;
import java.io.FileWriter;
import java.io.BufferedWriter;

public class Recycle
{
	public static void main(String[] args)
	{
/*		Set<Integer> perms = getPermutations(123456);
		
		for(Integer i: perms)
			System.out.println(i);*/
	
		try
		{
			Scanner s = new Scanner(new File("recycle.in"));
			BufferedWriter w = new BufferedWriter(new FileWriter(new File("recycle.out")));
			int numCases = s.nextInt();
			s.nextLine();
			
			for(int n = 1;n <= numCases; n++)
			{
				int A = s.nextInt();
				int B = s.nextInt();
				int count = 0;
				for(int k = A; k <= B; k++)
				{
					count += getNumPairs(k, B);
				}
				
				w.write("Case #" + n + ": " + count + "\n");
			}
			
			w.flush();
			w.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
	
	public static int getNumPairs(int n, int B)
	{
		Set<Integer> possibles = getPermutations(n);
		int count = 0;
		for(Integer i : possibles)
			if(i > n && i <= B)
				count++;
		return count;
	}
	
	public static Set<Integer> getPermutations(int n)
	{
		Set<Integer> perms = new TreeSet<Integer>();
		char[] digits = String.valueOf(n).toCharArray();
		
		for(int firstPos = 1; firstPos < digits.length; firstPos++)
		{
			String toBuild = "";
			for(int k = 0; k < digits.length; k++)
				toBuild += digits[(firstPos + k) % digits.length];
			perms.add(Integer.parseInt(toBuild));
		}
		return perms;
	}
	

}
import java.util.HashSet;
import java.util.Set;


public class TestCase {

	private int totalDigit = -1;
	private int max;
	private int min;
	public TestCase(String s) {
		String[] results = s.split(" ");
		totalDigit = results[0].length();
		min = Integer.parseInt(results[0]);
		max = Integer.parseInt(results[1]);
	}
	
	public int solve() {
		Set<Pair> total = new HashSet<Pair>();
		for (int i = min; i <= max; i++) {
			for (int j = 1; j < totalDigit; j++) {
				Pair p = getPair(i, j);
				if (p != null) {
					//System.out.printf("Adding pair(%d, %d), %b\n", p.getFirst(), p.getSecond(), total.add(p));
					total.add(p);
				}
			}
		}
		return total.size();
		
	}

	private Pair getPair(int number, int digit) {
		String source = String.valueOf(number);
		String target;
		Pair result = null;
		String first;
		String second;
//		if (digit == 1) {
//			first = source.substring(totalDigit - digit);
//			second = source.substring(0, digit);
////			target = source.substring(0, totalDigit) + source.substring(totalDigit - digit);
//		} else if (digit == 2) {
			first = source.substring(totalDigit - digit);
			second = source.substring(0, totalDigit - digit);
//		}
		target =  first + second;
		int targetNumber = Integer.parseInt(target);
		if (targetNumber >= min && targetNumber <= max & targetNumber != number) {
			result = new Pair(number, targetNumber);
		}
		return result;
	}
}
