#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <boost/algorithm/string/classification.hpp> // Include boost::for is_any_of
#include <boost/algorithm/string/split.hpp> // Include for boost::split
using namespace std;
 
int main() {
	std::string s = "as for whether when";
	std::vector<std::string> words;
	boost::split(words, s, boost::is_any_of(" "), boost::token_compress_on);
	// Sorting the int vector
    sort(words.begin(), words.end());
    for(string &this_s : words) std::cout << this_s << " ";
	return 0;
}

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