#include <iostream>
#include <sstream>
#include <string>
#include <algorithm>
#include <iterator>
#include <list>
 
int main()
{
    std::string str;
	std::string tokens;
	std::cout << "string:\n";
	std::getline(std::cin, str);
	std::cout << "tokens:\n";
	std::cin >> tokens;
	using isit = std::istream_iterator<std::string>;
	std::stringstream ss(str);
	std::list<std::string> words( isit( ss ), ( isit() ) );
	str.clear();
	ss.clear();
	ss.str(str);
	std::copy_if( begin(words), end(words), std::ostream_iterator<std::string>(ss, " "),
				[&tokens](const std::string &word)
				{ return word.find_first_of(tokens) == std::string::npos; } );
	std::cout << "result:\n";
	std::cout << ss.str();
    return 0;
}

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To be, or not to be: that is the question
en