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

public class Recycle {

    public static void main(String[] args) {
	Recycle r = new Recycle();
	writeOutput(r.countRecycleds(readInput()));
    }

    // Count all recycleds for all the inputs
    public String countRecycleds(ArrayList<String> lines) {
	String line;
	StringBuffer out = new StringBuffer();
	for (int i = 1; i < lines.size(); i++) {
	    line = lines.get(i);
	    String[] args = line.split(" ");
	    out.append("Case #" + i + ": ");
	    out.append(countRecycleds(Integer.parseInt(args[0]),
				      Integer.parseInt(args[1])));
	    out.append("\n");
	}
	return out.toString();
    }

    // Count all recycleds between A and B
    public int countRecycleds(int A, int B) {
	int count = 0;
	for (int n = A; n <= B; n++) {
	    count += countRecycledsForN(n, B);
	}
	return count;
    }

    // Count recycleds for one n (ie, number of ms)
    public int countRecycledsForN(int n, int B) {
	int digits = countDigits(n);
	int count = 0;
	Map<Integer,Boolean> used = new HashMap<Integer, Boolean>();
	// For each number of digits we're swapping
	for(int swap = 1; swap < digits; swap++) {
	    // The base 10 number to swap
	    int swapper = (int)Math.pow(10, swap);
	    // The digits being swapped
	    int swappedDigits = n % swapper;
	    // n without the digits being swapped
	    int swappedN = n / swapper;
	    int m = (swappedDigits * (int)Math.pow(10, digits - swap)) 
		+ swappedN;
	    // If m is valid, count it
	    if (n < m && m <= B && !used.containsKey(m)) {
		count++;
		used.put(m, true);
	    }
	}
	return count;
    }
    
    // Count the number of digits in n (base 10)
    public int countDigits(int n) {
	return (int)Math.log10(n) + 1;
    }

    public static void writeOutput(String s) {
	try{
	    BufferedWriter out = new BufferedWriter(new FileWriter("./Output.txt"));
	    out.write(s);
	    out.close();
	}catch (Exception e){
	    System.out.println(s);
	    throw new RuntimeException("Oops, couldn't write");
	}
    }

    public static ArrayList<String> readInput() {
	ArrayList<String> lines = new ArrayList<String>();
	try {
	    FileInputStream fstream = new FileInputStream("./Input.txt");
	    DataInputStream in = new DataInputStream(fstream);
	    BufferedReader br = new BufferedReader(new InputStreamReader(in));
	    String str;
	    while ((str = br.readLine()) != null) {
		lines.add(str);
	    }
	    br.close();
	    return lines;
	} catch (Exception e) {
	    throw new RuntimeException("Couldn't read");
	}
    }
}