use IO::Socket::INET;

use strict;
use warnings;

my $s = IO::Socket::INET->new(Proto => "tcp", 
                              LocalHost => "localhost", 
							  LocalPort => 3000, 
							  Timeout => 60, 
							  Listen => 10,
							  Reuse => 1) || die "failed to start\n";
print "regexp service started\n";
while (1) {
	if (my $c = $s->accept()) {
		print "Got one service request\n";
		my $func = readLine($c);
		if ($func eq "match") {
			my $string = readLine($c);
			my $pattern = readLine($c);
			if ($string =~ m/$pattern/) {
				print $c "1\n";
			} else {
				print $c "0\n";
			}
		} elsif ($func eq "substitute") {
			my $string = readLine($c);
			my $pattern = readLine($c);
			my $replacement = readLine($c);
			$string =~ s/$pattern/$replacement/;
			print $c "$string\n";
		}
		close($c);
	}
}

sub readLine {
	my $c = shift;
	my $line = <$c>;
	$line =~ /(.*)\r\n/;
	return $1;
}

##</code><code>##

import java.net.*;
import java.io.*;

class RegExp 
{
	public static boolean match(String string, String pattern) {
		try
		{
			Socket s = new Socket("localhost", 3000);
			BufferedReader in =  new BufferedReader(new	InputStreamReader(s.getInputStream()));
			PrintWriter out = new PrintWriter(new BufferedOutputStream(s.getOutputStream()), true);
			out.println(new String("match"));
			out.println(string);
			out.println(pattern);
			String data = in.readLine();
			if (data.equals("1"))
			{
				return true;
			} else {
				return false;
			}
		}
		catch (IOException e)
		{
			System.out.print(e);
			return false;
		}
	}

	public static String substitute(String string, String pattern, String replacement) {
		try
		{
			Socket s = new Socket("localhost", 3000);
			BufferedReader in =  new BufferedReader(new	InputStreamReader(s.getInputStream()));
			PrintWriter out = new PrintWriter(new BufferedOutputStream(s.getOutputStream()), true);
			out.println(new String("substitute"));
			out.println(string);
			out.println(pattern);
			out.println(replacement);
			String data = in.readLine();
			return data;
		}
		catch (IOException e)
		{
			System.out.print(e);
			return null;
		}
	}

}

##</code><code>##

class RegExpTest
{
	public static void main(String[] argv) 
	{
		if (argv[0].equals("m"))
		{
			boolean result = RegExp.match(argv[1], argv[2]);
			System.out.print(result);
		} else if (argv[0].equals("s"))
		{
			String result = RegExp.substitute(argv[1], argv[2], argv[3]);
			System.out.print(result);
		}
	}
}