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	diff --git a/t/test_classify_new.cc b/t/test_classify_new.cc
	index 7aa3b04..c98355f 100644
	--- a/t/test_classify_new.cc
	+++ b/t/test_classify_new.cc
	@@ -1,380 +1,381 @@
	/**
	* \authors The HEJ collaboration (see AUTHORS for details)
	* \date 2019
	* \copyright GPLv2 or later
	*/
	#include <iostream>
	#include <random>

	#include "HEJ/Event.hh"
	#include "HEJ/exceptions.hh"

	#define ASSERT(x) if(!(x)) { \
	throw std::logic_error("Assertion '" #x "' failed."); \
	}

	namespace {
	const fastjet::JetDefinition jet_def{fastjet::JetAlgorithm::antikt_algorithm, 0.4};
	const double min_jet_pt{30.};
	const std::array<std::string, 8> all_quarks{"-4","-3","-2","-1","1","2","3","4"};
	const std::array<std::string, 9> all_partons{"g","-4","-3","-2","-1","1","2","3","4"};
	const std::array<std::string, 3> all_bosons{"h", "Wp", "Wm"};

	static std::mt19937_64 ran{0};

	void shuffle_particles(HEJ::Event::EventData & ev) {
	std::shuffle(begin(ev.incoming), end(ev.incoming), ran);
	std::shuffle(begin(ev.outgoing), end(ev.outgoing), ran);
	}

	// if pos_boson = -1 (or not implemented) -> no boson
	HEJ::Event::EventData get_process(int const njet, int const pos_boson){
	HEJ::Event::EventData ev;
	if(njet == 2){
	switch(pos_boson){
	case 0:
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 198, 33, -170, 291}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-154, 68, 44, 174}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -44, -101, 88, 141}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -322, 322}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 284, 284}, {}};
	return ev;
	case 1:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -6, 82, -159, 179}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 195, -106, 74, 265}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-189, 24, 108, 219}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -320, 320}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 343, 343}, {}};
	return ev;
	case 2:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -80, -80, -140, 180}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -60, -32, 0, 68}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 140, 112, 177, 281}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -246, 246}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 283, 283}, {}};
	return ev;
	default:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -72, 24, 18, 78}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 72, -24, 74, 106}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -46, 46}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 138, 138}, {}};
	return ev;
	}
	}
	if(njet == 3){
	switch(pos_boson){
	case 0:
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 152, -117, -88, 245}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-146, 62, -11, 159}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 126, -72, 96, 174}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-132, 127, 144, 233}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -335, 335}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 476, 476}, {}};
	return ev;
	case 1:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-191, 188, -128, 297}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 199, 72, -76, 257}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 184, -172, -8, 252}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-192, -88, 54, 218}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -591, 591}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 433, 433}, {}};
	return ev;
	case 2:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -42, 18, -49, 67}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -12, -54, -28, 62}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 99, 32, -16, 163}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -45, 4, 72, 85}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -199, 199}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 178, 178}, {}};
	return ev;
	case 3:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -65, -32, -76, 105}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -22, 31, -34, 51}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -12, -67, -36, 77}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 99, 68, -4, 173}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -278, 278}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 128, 128}, {}};
	return ev;
	default:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -90, -135, 30, 165}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-108, 198, 76, 238}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 198, -63, 126, 243}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -207, 207}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 439, 439}, {}};
	return ev;
	}
	}
	if(njet == 4){
	switch(pos_boson){
	case 0:
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 199, 72, -76, 257}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-200, -155, -64, 261}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 198, 194, 57, 283}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 1, 32, 8, 33}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-198, -143, 186, 307}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -515, 515}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 626, 626}, {}};
	return ev;
	case 1:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 198, 61, -162, 263}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 199, 72, -76, 257}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-200, 135, 144, 281}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-198, -186, 171, 321}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 1, -82, 122, 147}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -535, 535}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 734, 734}, {}};
	return ev;
	case 2:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-180, -27, -164, 245}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-108, 78, -36, 138}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 196, -189, 68, 307}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-107, 136, 76, 189}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 199, 2, 178, 267}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -512, 512}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 634, 634}, {}};
	return ev;
	case 3:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -12, -30, -84, 90}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -72, 22, -96, 122}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 68, 0, -51, 85}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 64, 72, -81, 177}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -48, -64, 84, 116}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -409, 409}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 181, 181}, {}};
	return ev;
	case 4:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -72, -49, -72, 113}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -48, 0, -36, 60}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -12, 54, -36, 66}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 68, -77, -56, 117}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 64, 72, -81, 177}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -407, 407}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 126, 126}, {}};
	return ev;
	default:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 248, -56, -122, 282}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 249, 30, -10, 251}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-249, -18, 26, 251}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-248, 44, 199, 321}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -506, 506}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 599, 599}, {}};
	return ev;
	}
	}
	if(njet == 6){
	switch(pos_boson){
	case 0:
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 349, 330, -94, 505}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-315, -300, 0, 435}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 347, 306, 18, 463}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-249, -342, 162, 453}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 345, 312, 284, 545}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-324, -126, 292, 454}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-153, -180, 304, 385}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -1137, 1137}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 2103, 2103}, {}};
	return ev;
	case 1:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 242, 241, -182, 387}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 243, 238, -190, 409}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-218, -215, -74, 315}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-224, -224, 112, 336}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 241, 182, 154, 339}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -53, -234, 126, 271}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-231, 12, 156, 279}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -1117, 1117}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 1219, 1219}, {}};
	return ev;
	case 2:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 151, 102, -42, 187}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -86, -46, -17, 99}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 152, 153, 0, 249}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -60, -135, 64, 161}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 150, 123, 110, 223}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-154, -49, 98, 189}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-153, -148, 144, 257}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -504, 504}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 861, 861}, {}};
	return ev;
	case 3:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 198, 197, -66, 287}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-198, -189, -54, 279}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-200, -64, 2, 210}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 199, 158, 6, 283}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-199, -184, 172, 321}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 196, 168, 177, 313}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 4, -86, 92, 126}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -745, 745}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 1074, 1074}, {}};
	return ev;
	case 4:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 151, 102, -42, 187}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -86, -133, -14, 159}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-154, -104, -8, 186}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -60, 11, 0, 61}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 152, 153, 0, 249}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 150, 125, 90, 215}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-153, -154, 126, 251}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -578, 578}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 730, 730}, {}};
	return ev;
	case 5:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -15, -90, -94, 131}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -11, 82, -74, 111}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 23, -80, -64, 105}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -48, -25, -36, 65}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -12, 99, -16, 101}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 68, 92, -18, 170}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { -5, -78, 54, 95}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -513, 513}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 265, 265}, {}};
	return ev;
	case 6:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 198, 197, -66, 287}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 4, -84, -18, 86}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-198, -60, -36, 210}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 196, -78, -36, 214}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-200, 45, 0, 205}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-199, -178, 2, 267}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::higgs, { 199, 158, 6, 283}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -850, 850}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 702, 702}, {}};
	return ev;
	default:
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-350, -112, -280, 462}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 347, 266, -322, 543}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-349, -314, -38, 471}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 349, 348, 12, 493}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, {-342, -54, 23, 347}, {}});
	ev.outgoing.push_back({HEJ::ParticleID::gluon, { 345, -134, 138, 395}, {}});
	ev.incoming[0] = {HEJ::ParticleID::gluon, { 0, 0, -1589, 1589}, {}};
	ev.incoming[1] = {HEJ::ParticleID::gluon, { 0, 0, 1122, 1122}, {}};
	return ev;
	}
	}
	throw HEJ::unknown_option{"unkown process"};
	}

	bool couple_quark(std::string const & boson, std::string & quark){
	if(abs(HEJ::to_ParticleID(boson)) == HEJ::ParticleID::Wp){
	- const int W_charge = abs(HEJ::to_ParticleID(boson))>0?1:-1;
	auto qflav{ HEJ::to_ParticleID(quark) };
	- if(W_charge*qflav > 0 && qflav%2 == 1) return false;
	- if(W_charge*qflav < 0 && abs(qflav%2) == 0) return false;
	+ if(!HEJ::is_anyquark(qflav)) return false;
	+ const int W_charge = HEJ::to_ParticleID(boson)>0?1:-1;
	+ if(W_charge*qflav < 0 && !(abs(qflav)%2)) return false; // not anti-down
	+ if(W_charge*qflav > 0 && (abs(qflav)%2)) return false; // not up
	quark=std::to_string(qflav-W_charge);
	}
	return true;
	}

	// create event corresponding from given Configuration
	HEJ::Event parse_configuration(
	std::array<std::string,2> const & in, std::vector<std::string> const & out
	){
	auto boson = std::find_if(out.cbegin(), out.cend(),
	[](std::string id){ return HEJ::is_AWZH_boson(HEJ::to_ParticleID(id)); });
	int const pos_boson = (boson == out.cend())?-1:std::distance(out.cbegin(), boson);

	size_t njets = out.size();
	if(boson != out.cend()) --njets;

	HEJ::Event::EventData ev{get_process(njets, pos_boson)};
	ASSERT((pos_boson==-1) \|\| (ev.outgoing[pos_boson].type == HEJ::ParticleID::higgs));
	for(size_t i=0; i<out.size(); ++i){
	ev.outgoing[i].type = HEJ::to_ParticleID(out[i]);
	}
	for(size_t i=0; i<in.size(); ++i){
	ev.incoming[i].type = HEJ::to_ParticleID(in[i]);
	}
	shuffle_particles(ev);

	auto const clustered{ ev.cluster(jet_def, min_jet_pt) };
	ASSERT(clustered.jets().size() == njets);
	return clustered;
	}

	bool match_expectation( HEJ::event_type::EventType expected,
	std::array<std::string,2> const & in, std::vector<std::string> const & out
	){
	HEJ::Event ev{parse_configuration(in,out)};
	if(ev.type() != expected){
	std::cerr << "Expected type " << HEJ::event_type::names[expected]
	<< " but found " << HEJ::event_type::names[ev.type()] << "\n" << ev;
	return false;
	}
	return true;
	}

	bool check_fkl(){
	using namespace HEJ;
	for(int njet=2; njet<=6; ++njet){ // all multiplicities
	if(njet==5) continue;
	for(std::string const & first: all_partons) // all quark flavours
	for(std::string const & last: all_partons){
	std::array<std::string,2> base_in{first,last};
	std::vector<std::string> base_out(njet, "g");
	base_out.front() = first;
	base_out.back() = last;
	if(!match_expectation(event_type::FKL, base_in, base_out))
	return false;
	for(auto const & boson: all_bosons) // any boson
	for(int pos=0; pos<=njet; ++pos){ // at any position
	auto in{base_in};
	auto out{base_out};
	// change quark flavours for W
	int couple_idx{ std::uniform_int_distribution<int>{0,1}(ran) };
	if(!couple_quark(boson, couple_idx?out.back():out.front()))
	continue;
	out.insert(out.begin()+pos, boson);
	if(!match_expectation(event_type::FKL, in, out))
	return false;
	}
	}
	}
	return true;
	}

	bool check_uno(){
	using namespace HEJ;
	for(int njet=3; njet<=6; ++njet){ // all multiplicities >2
	if(njet==5) continue;
	for(std::string const & uno: all_quarks) // all quark flavours
	for(std::string const & fkl: all_partons){
	for(int i=0; i<2; ++i){ // forward & backwards
	std::array<std::string,2> base_in;
	std::vector<std::string> base_out(njet, "g");
	const int uno_pos = i?1:(njet-2);
	const int fkl_pos = i?(njet-1):0;
	base_in[i?0:1] = uno;
	base_in[i?1:0] = fkl;
	base_out[uno_pos] = uno;
	base_out[fkl_pos] = fkl;
	HEJ::event_type::EventType expectation{ i?event_type::unob:event_type::unof };
	if( !match_expectation(expectation, base_in, base_out) )
	return false;
	for(auto const & boson: all_bosons) // any boson
	// at any position inside FKL chain
	for(int pos=i?(uno_pos+1):fkl_pos; pos<=(i?(fkl_pos+1):uno_pos); ++pos){
	auto in{base_in};
	auto out{base_out};
	// change quark flavours for W
	int couple_idx{ std::uniform_int_distribution<int>{0,1}(ran) };
	if(!couple_quark(boson, couple_idx?out[fkl_pos]:out[uno_pos]))
	continue;
	out.insert(out.begin()+pos, boson);
	if(!match_expectation(expectation, in, out))
	return false;
	}
	}
	}
	}
	return true;
	}
	}

	int main() {
	if(!check_fkl()) return EXIT_FAILURE;
	if(!check_uno()) return EXIT_FAILURE;
	//TODO next:
	// generate a bunch of test configurations
	return EXIT_SUCCESS;
	}

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