/* ****************************************************************** 
 * 
 *   Marcos Abreu Bento
 * 
 *   marcosbento@gmail.com
 * 
 * ------------------------------------------------------------------
 * 
 * Experiments with string tokenizer and Boost
 * 
 * ****************************************************************** */

#include <string>
#include <iostream>
#include <sstream>
#include <iterator>
#include <vector>

#include <boost/foreach.hpp>
#include <boost/tokenizer.hpp>

/*
 * string tokenizer using standard input stream iterators
 * 
 * NOTE: considers non-visible characters (e.g. " \n\t") as separators 
 * ******************************************************************* */
void tokenize( std::vector<std::string>& tokens,
               const std::string& source )
{
	std::stringstream strstr(source);

	std::istream_iterator<std::string> it(strstr);
	std::istream_iterator<std::string> end;

	tokens.assign(it, end);
}

/*
 * boost related type alias
 * ******************************************************************* */
typedef boost::char_separator<char> 			char_separator_t;
typedef boost::tokenizer< char_separator_t > 	char_tokenizer_t;

/*
 * string tokenizer using boost tokenizing facilities
 * ******************************************************************* */
void tokenize( std::vector<std::string>& tokens,
               const std::string& source,
               const std::string& delimiters )
{
	char_separator_t separator( delimiters.c_str() );
	
	char_tokenizer_t tokenizer(source, separator);

	BOOST_FOREACH( std::string s, tokenizer )
		tokens.push_back( s );
}

/*
 * vector printing with output stream iterator
 * ******************************************************************* */
template<class T>
void print_vector( const std::vector<T>& v )
{
	std::ostream_iterator<T> output( std::cout, "\n" );
	std::copy( v.begin(), v.end(), output );
}

/*
 * Main driver
 * 
 * USAGE: Tokenizer < INPUT > OUT
 * ******************************************************************* */
int main()
{
	std::string line;
	
	while( std::getline(std::cin, line) )
	{		
		std::vector<std::string> tokens;
		
		tokenize( tokens, line, " .,:;{}()<>\\\t\n\"");
		
		print_vector<std::string>( tokens );
	}

	return 0;
}